For normal series:
K-ON! (Cant believe no one mentioned this one yet!)
Hayate no Gotoku season 2
Natsu no Arashi (This is a maybe, but it's a SHAFT series, and I can't ignore it)
Bakugan: New Vestroia (Yes, I like it)
Higurashi Rei (even though it's listed as an OVA, it looks like a normal series to me)
Kodomo no Jikan season 2 (see above)
Saki (I know, it's a GONZO series, don't whine)
Shinkyouku Soukai (from Diomedea, formerly Studio Barcelona)
As for OVA's:
Lupin III vs Detective Conan
Hayate no Gotoku
Yurumates (Indeprox should make a nice impression as a new animation company with this)
Koihime Musou (hmm...kinda risky releasing it on April Fools, and I've even seen the trailer for it)