Another comment mentions llama may get an open license, and there are other emerging alternatives. In six months there will be lots of options. I would not spend my time building anything around a model that started in such a sketchy way.
It would be interesting to hear about why they decided to change their license and what their plans are for the future.
I admit Falcon has really pissed my off because they pretended they had an open source model when they really released a sleazy freemium thing.