Do ranged feats like Manyshot apply to thrown weapons?

It just seems like thrown weapons are entirely sub-optimal. But I'm really caught on the idea of a halfing ranger tossing daggers about, especially given that I found a set of +2 frost returning daggers.

Even if they don't, is a halfling ranger a viable choice? Allow ranger to grant you TWF and skills, mix in a level or three of rogue, dual wield daggers when close, and thrown weapons at range?

Or am I just gonna be sad playing this?