Early 2011 MBP's are amazing, very fast and I'd buy one. But I can wait, so if you can wait also - then why not! I'm sure there will be a mid / late 2011 MBP refresh (judging by previous release cycle).
I'd really like a higher resolution panel on the 13" MBP but I'll be OK with the 1280x800 I guess. Oops went off topic...
I'd look more for a Q1 2012 release. The Ivy Bridge chips that will be in the new MBP will be debuted at CES 2012, just like Sandy Bridge was debuted at CES this year. Personally, I think computers are so fast now that yearly updates are plenty for most users. The majority of users don't even use the computers they currently have to their full potential.
I was also wanting a higher resolution on the 2011 13"! But now that I actually have one, I really love it. Low resolution or not!