Lots of people happy. He exceeded expectations, and they got several blurbs out there from commentators that didn’t say anything silly about it, kept to the facts. Smart investment on the Dogecoin community’s part.
Use Memclock 1500 and Engine 1050 to begin with, it will slow your system down so if you need to use your system whilst you are mining, try Memclock 1425 and Engine 950, that should give you a bit of room to play with…
libzerocoin has received no commits since July. It is still experimental and not complete (v0.1alpha). There is a long way of getting a working implementation with no critical bugs. If they want to release it as an altcoin rather than a library, good luck.