Birds & Beans, Metal Torrent, Paper Mario, and Kirby
If you have some coins to spare, you can grab four new games right now from Club Nintendo: Birds & Beans (DSiWare, 100 Coins), Metal Torrent (DSiWare, 150 Coins), Paper Mario (Wii Virtual Console/Nintendo 64, 200 Coins), and Kirby Super Star (Wii Virtual Console/SNES, 150 Coins). They're all available until March 10, 2013.
As for recommendations, Kirby Super Star and Paper Mario are probably my only must-haves if you haven't played Kirby on the DS or the Wii collection already. The other two games are pretty solid, making it one of the best Club Nintendo offerings to date.
Head on over to Club Nintendo's website now to claim your rewards, if you're interested.