Yeah well, you just got in 2 hours what took me about 6 months worth of scrambling around. I bought my 2100 printer right when it came out while I was living in Prague. I got nothing but purple and blue prints for weeks and nearly threw the g-d thing in the trash. Then I started reading that Computer Darkroom site as he was figuring out both Photoshop's new CS version AND the Epson 2100 which had all sorts of quirks when it first came out. Anyway, sad story, but suffice it to say that Epson owes that Computer Darkroom guy a big check. I think there are a lot of people who would have otherwise returned their printers had he not figured it all out.
If you are printing color and black & white, eventually you may want to dedicate a printer to black & white ONLY using MIS Inksets (
http://www.inksupply.com/bwpage.cfm). The 1280-1290 printers are supposedly particularly good with these inks. They advocate using non-Epson workflows with their inks, but I have found the Epson settings for matte paper at least to work much better than any of the non-Epson things with the MIS inks. (I realize now this is unclear so here is some clarification: MIS + standard Epson settings for Matte Paper/Matte Ink as per Computer Darkroom website = best combo. As with anything though, YMMV.)
On the other hand, there are a lot of printers that do color very well without even trying, but the options from Canon & HP might represent better values than some of the Epson printers.
In other words, glad you got these prints figured out. Welcome to the craziness.