Via a trade. These are very, very cool. So far I've opened all but the Chopper Droid, which a friend of mine wants. Grrrr....
Dooku - very VOTC quality-esque. Outstanding sculpt and articulation. I already knew this from the pics, but he's even better in person. Will get a couple more in April
Polis Massan - apparently the name "Polis Massan" is the name of his species, perfect sculpt and darn near perfect articulation, just no knee articulation, but that's ok and I want a few more in April
Mas Amedda - what an upgrade from his appearance in TPM and AOTC - he looks damn tough and has pretty good articulation as well as a cool removable helmet and two ended tongue that is removable (but looks great when taken out too); his robe is removable and he comes with a very cool gold staff with what looks like a hooded Palpatine on the top of the staff - will probably get at least one more later
Chopper Droid - looks great, but haven't really played with it as it's in the package. Probably will cave in and let my friend have this one. But I'll get several in April.