There is a TON of information about interfaces if you search here/google/gearslutz, but I still think this is a great topic idea. If you've got personal experience with more than one interface, share simple pros, cons, and opinions. I did a quick search and there's nothing like that.
M-Audio Delta 1010
Pros: recorded an album at a surprisingly high quality (along with an FMR RNP) with very little cash invested. When it broke I was able to fix it myself.
Cons: driver instabilities (especially while using midi in/out). I had to replace all the capacitors at one point due to some "known issue" that wasn't covered under a warranty (0db-ish noise at every input).
Motu 828
Pros: Very stable and frequently updated drivers. Great price. Cons: Poor quality a/d converters. Meter are inaccurate and hard to read. No midi in/out.
Fireface 400
I'll let you know when I'm able to use it, I bought it broken on eBay, it's in the shop.
Favorite between 828 and 1010: 828 because it always works