The Good:
I don't care what everyone seems to say, Meddling Mage is Teh Awesome. Yes, a deck needs to be found for him to have a home in, but naming a card and not letting your opponent play it is great. This guy really needs a good sort of deck built around him. Maybe you'll be the one to do it? Keep working, and keep reading. Test a lot.
The Bad:
Land Tax/Scroll Rack isn't a draw engine anymore.

It doesn't get working until the turn after you play the tax, and only if you've missed more land drops than your opponent. Ideal case, you Tax first turn, going second, and you get to pick out some lands on your second upkeep--but now you've got to play the scroll rack with your second turn mana... and your tempo falls onto it's face. Besides, after one tax/rack, you've traded four mana and two cards for three cards--the same as Inspiration.
When Parfait ran Tax/Rack as a draw engine (way back when), it ran 3 land tax and 4 scroll rack, plus probably about 3 Argivian Find, to get the rack back. This was because, assuming youv'e got the time to get the tax/rack engine working, every good player is going to gun for your rack with everything they've got.
Also, Moat won't come out until after you've lost vs. Workshop Aggro. :-/
The Indifferent:
Where do you plan on playing this thing to win? If everybody's playing such slow decks that this whole works can come online, you'd own them up with something like Slax or Ami's budget control-madness build.
