Senior Bowl participants have checked in in Mobile, and Optimum Scouting has their official heights and weights. Draft Countdown even has arm and hand lengths. If their websites, our sporadic updates, and NFL Network video aren't enough for you, Eric Galko of OP.com, Wesley Bunting of National Football Post and ESPN.com's on-site reporters look like they're doing a good job of tweeting. Galko already has several updates from check-ins.
Here are a few early check-in notes, preceding what will hopefully be lots of practice reports via twitter:
WesBunting
#WestVirginia RB Noel Devine only 160... didn't wear spandex....shorts to cover skinny legs...#nfldraft
OptimumScouting
Ricky Stanzi at 6'4...he didn't cheat his size all year either, he and Kaepernick the tallest
OptimumScouting
Eric Hagg, Nebraska, late edition at safety...big hands at 10 and 2/8, 6'1, 206
WesBunting
Alabama OT James Carpenter was pretty sloppy...but long armed kid looks more like OG to me ...#nfldraft