Dejan had a quick note on his  blog today listing Elvin Ramirez as a name to watch for the Pirates in the Rule 5.  There was also this Twitter post from Adam Rubin of ESPN New York:

Hearing Mets may very well lose RHP Elvin Ramirez in Rule 5 draft. No control, but hitting 97 mph in Dominican Republic with scouts watching

From what I can gather in a quick search Ramirez is your typical "more a thrower than a pitcher" type.  He's impressive physically, standing a muscular 6'3" and just turned 23 in October.   The "no control" part is pretty accurate.  In A+ ball this year he had a BB/9 of 5.3 over 73.1 innings.  He added another 6 2/3 in AA where he walked 6 batters.  He had worked exclusively as a starter in the US prior to this season when he worked exclusively out of the bullpen.  This seems to have added a few MPH to his fastball, as reports from last season don't mention him hitting the mid-90s.  This also led to an increased K-rate (8.1 this year), but actually increased his walk rate.

http://www.baseball-reference.com/minors/player.cgi?id=ramire001elv

Through 20 2/3 innings in the Dominican league this offseason he has 26 strikeouts vs. only 4 walks and a WHIP under 1.