According to this article in the Post-Gazette, the Penguins are on the verge of acquiring Gary Roberts from the Florida Panthers. Roberts has only waived his no-trade clause for Toronto and Ottawa, so it would seem the team is waiting to see if he'll waive the no-trade clause for them too.
ESPN has an article as well, citing that the Pens would send a player from their roster to the Panthers.
Roberts is 40, but he still averages about 17 minutes per game this season. He can score and also has that gritty quality that Ray Shero seems to like. Roberts will be an unrestricted free agent after this season.
TSN has an article about John Muckler, the head honcho in Ottawa. He says that the asking price for guys is too high right now. The name Gary Roberts is specifically mentioned (along with Bill Guerin) as being too expensive. That's not good for the Pens.
I'm not sure who you give up to get Roberts. I don't like that it's a player on the Pens current roster, because I can't imagine giving up someone like Petro, Thorburn or Melichar to get a guy that will play two months for you.