That's been something we've thought about doing, yes. We really appreciate the gesture! We haven't set up an account for it though.
Also, we'll do a news post about this soon, and I hope it doesn't put you off, but you should know that Dyson is going to be sold commercially eventually. We'll have a substantial free version, features of which we haven't yet decided on but will likely tend towards the old shareware games (Doom etc) in terms of proportion of content of the full game.
Hope that helps - I'll get chatting to Rudolf to see whether he thinks a donation system is still appropriate.
Once again thanks, you've no idea how great this makes us feel.