v0.4.4 is already available:

Binaries for RaspberryPi or other ARM devices? Development Okay sorry for the delay. I wanted to do some testing and make sure this thing doesn’t melt anyones RaPi. Still, this is as unofficial as unofficial gets. Although I’ve done some testing with it anyone who uses this should consider themselves a tester as well. Do not run it in an environment that you’re afraid to lose. I don’t want to hear “all my NuShares are gone!!!” tomorrow. You’ve been warned. So to sidestep from the super-serious warning I’ll say that i’m not a RaPi …

If you want to operate it in testnet, make sure to enter this into the nu.comf:

Binaries for RaspberryPi or other ARM devices? Development Testnet nodes: addnode=198.52.200.26 addnode=198.52.199.30 addnode=198.52.217.2 addnode=198.52.200.14