If you have one of the top SS's, I would think Roberts would be a heck of a compliment. He'll get the average, score lots of runs, and steal a ton of bases. 2B only has so many good hitters anyway...why ruin your BA with someone like Crosby if you have a SS like Jeter, Nomar, Renteria, or Tejada?
Even if you don't have one of those guys, I still think he's a good guy to have. I have stolen him super-late in two drafts this year - 18th (last) round in one and 21st (next to last) round in the other.

The One, The Only, The Incomparable Mercer Boy.
MySpace blog (updated 6/21 - Pirates walkout.)