Ha! I finally got around to adjusting Mono-Blue to include Shoreline Rangers. I had assumed they would be worthy of 2-3 slots. I had assumed they couldn't replace Morphling on their best day. Let it be said that I was half correct.
I know Smmenen has gone back to working with MonoBlue, but I don't know if he has posted much about it. I didn't see anything in recent threads, hence the creation of this one.
I tossed the deck together and blindly loaded it in a random game versus the ever-clever MattTG. He was playing TnT, which is not usually a very pretty matchup before sideboarding.
I had in my head that I'd want to keep at least one Morphling in the maindeck for reliability, but when it came down to a room issue as I was building the deck (a few days ago) in a total of about 45 seconds, he got trashed.
Without further adeiu, I present for your viewing pleasure:
SHORELINE RANGER BLUESPELLS (23)
1 Ancestral Recall
1 Fact or Fiction
4 Force of Will
4 Impulse
4 Mana Drain
4 Mana Leak
2 Miscalculation
2 Misdirection
1 Time Walk
ARTIFACTS (10)
7 SoLoMoxen
3 Powder Keg
ENCHANTMENTS (4)
2 Back to Basics
2 Control Magic
CREATURES (7)
4 Ophidian
3 Shoreline Ranger
LAND (16) <--omg.
13 Island
1 Library of Alexandria
1 Strip Mine
1 Wasteland
SIDEBOARD (15)
2 Back to Basics
1 Blue Elemental Blast
2 Disrupt
2 Control Magic
1 Forbid
1 Misdirection
1 Morphling
1 Nevinyrral's Disk
1 Powder Keg
2 Psionic Blast
1 Thwart
Stevie (Menendian) had mentioned to me at some point that he was now testing Miscalculation, so I figured I'd give it a shot. They don't seem half bad, so far. Your alternatives cardpool is basically comprised of Prohibit. Counterspell doesn't fit the bill because you want to be able to cast this with an Island-Mox opening.
The mana has been purely wonderful. In four games, I have drawn 2 rangers each game, and have cycled one a total of once.
You'll note the total lack of Stifle anywhere in the maindeck or sideboard. Here is my reasoning:
Should I run it in the maindeck? No. Why? Because as damn useful as it is, don't I want cards that ensure my survival rather than perform some -random- annoyance? Yes.
Should I run it in the sideboard? There's a small chance--but what would I side it in against? I have no idea.
Though it comes to mind that it might actually have focussed use versus combo where it can buy time by hitting a Rector, Illusions, card with Storm, etc. The issue there is that you'd want to have multiples available, and the sideboard would need major adjustment to adhere to this theory. As for a general sideboard, the only slot that seems fairly free is that which is currently occupied by BEB. Sideboards are all about the metagame, though, so feel free to test, test, and test!
Rangers, as far as acting as a creature, have also been excellent. Versus most things that aren't Keeper (stp-happy), they are difficult to kill in one shot (especially since Edicts are becoming somewhat scarce).
The sideboard is obviously junk I just happened to click on before hitting enter, but I shall provide reasoning for card choices that may not explain themselves.
-BEB: It does what it does. Whatever.
-Forbid: I wanted another hard counter and, for no apparent reason at that moment, just happened to crave the Phid synergy more than the reliability of Counterspell.
-Morphling: A sturdy win condition to bring in versus control.
-Nev's Disk: The oldschool reset. Boy does this thing wipe out permanents versus those decks that...you know...run lots of...permanents.
-Thwart: Yet another anti-control tool. This is just a last-ditch effort trick you pull out of your sleeve at the end of a counter war. I don't normally go with it unless the cardpool is limited or there is benefit to bouncing lands, but I kept wanting more help in the control match up and had already attained my fill of Disrupts, Misdirections, and hard counters that cost 2 or more mana.
At the moment, there are a total of zero things I'm even pondering changing in the maindeck.
On my final note, I ask of you to question, to comment, to test, and to tell us your findings. Good luck.

-Edit-
Notes: The Disrupts, I believe, are much better off as vanilla Counterspells. As it turns out, what they'd replace in the maindeck versus, say, Keeper, would be the Mana Leaks--reason being that Mana Leak is severely weakened if not used incredibly early on in such a match up. Disrupt may cantrip, but chances are you're better off simply countering the spell.
For the record, in the games versus TnT, I sideboarded as follows:
-2 Mana Leak, +1 Nevinyrral's Disk, +1 Forbid
-2 Miscalculation, +2 Psionic Blast
-2 Misdirection, +2 Control Magic
-1 Shoreline Ranger, +1 Powder Keg (ph33r that Welder)
Theoretic sideboarding pattern for Keeper:
-2 Control Magic, +2 Back to Basics
-2 Mana Leak, +2 Counterspell
-3 Powder Keg, +1 Misdirection, +1 Morphling, +1 Thwart
(-1 Mana Leak/Miscalculation, +1 Forbid)\n\n