Last time I did (1/2 year ago or so), it was working, stable and useable. Problem is that it currently doesn't have a GUI. It loads standard Hydrogen kits, and of course ordinary .wav samples...

Wrapping that to be an LV2 would be *much* more productive than trying to code a sampler from scratch... trust me, I've coded my own sampler and its horridly CPU hungry!
-Harry