Actually, if you want a fierce guiltfeeder deck, you need to run Mesmeric Orb and Gaea's Blessing in your own deck.  You can continue to replenish your library while wittling away at opponents.

Best combo EVAR!

7UUUUUUUUU - Mind Over Matter, Arcanis, & Reveka!  =P

But on a more serious note.  Congregate can be the nuts in multiplayer, as well as Insurrection and Reins of Power.

27) Negator + Bolt is a bigger nonbo than Wu and a woman

Energy Flux has seen play for quite some time in sideboards if your deck could support blue.  But the problem is, as was pointed out a few posts before, is that with some of the newer Workshop decks (I.E. Slaver), they can often times wait to drop moxen and other accelerators until they are ready to go infinite if need be.  As well, with the newer Slaver decks, they are running counters, which wasn't the case in most older artifact decks.  You need to be able to stop them from activating their artifacts (Null Rod), or get rid of their artifacts all together (Oxidize, Rack and Ruin, et cetera).

You are missing Slaver and Madness, which are two big ones.

It just comes to show that a lot of t1 players need to look elsewhere (outside the box) for decks and deck ideas/skeletons.

It is a great thing, in my opinion.  If you look at block/standard/extended formats, you can pull some of the best decks in t1 from those formats.  It does make decks somewhat more accessible, but that is just an added bonus.  You can literally take most of the top level decks from those formats, add moxes, and run with it.  People just need to come to the stark realization that their old favorite t1 deck in most cases just can't handle the newer decks.  The lose of character is negligable, this is evolution in the works.

P.S: Feel the love of cotton.