I tend to think its as dead or alive as the people that use it, and help etc. There's often an issue if there is just one active developer, real life other stuff crops up and work gets in the way :).
I don't tend to go along with use Raphael rather than Snap because something is or isn't being actively developed. I think if someone needs old browser support, Raphael is the one to use. If one needs more later features, importing SVGs, support of Group elements etc, then Snap is the one. Its the same author. Use either depending on which strength is needed.
Are there any show stopping bugs that folk are aware of ? I'm just wondering if there could be easy workarounds for them, but I'm not aware of any in particular.
What would people want added to Snap if it was being actively developed ?