Some of you might recall I did this last year. It went pretty well.
The very early pre-Combine most popular first round pick was Aaron Maybin last year. Eventually though, after the Combine and leading up to the draft, Brian Cushing was at the top of the list, so it's 1 for 1 so far, heh.
Anyway, check it out. I'll be updating it often and probably adding many more mock drafts before the big day gets here:
2010 Texans Mock Draft Tracker