Haven't played much BW (any meta) at all, and I've only played a few matches on the ladder (very fun meta), but I guess I'll just share a few thoughts. I love Sandshrew. Great defensive bulk with Evolite, stabbed EQ, can set up SR and spin, and last move is for utility (I use Knock Off). I'd probably say it is in the C-D range of Pokemon but it definitely has a niche for the tier I would say. Magcargo and Noctowl have also been pleasant surprises for me.