Frankly I wasn't aware about SFOS until a week ago or so. Few years ago (4 maybe) when I left my N900 for Android it ment to be only until Neo900 will come out. But sadly now it looks like it will never happen. Luckily now there is Qwerty project which looks very promising. Just start to read on it and AFAIK Sailfish was chosen as an OS for it. I can't imagine that porting programs write in python would be that difficult assuming that SFOS natively runs python scripts (part I haven't got to yet). I'll just start slowly with AGTL for Maemo if Daniel Fett will get back to me. If not I will just fork out his version for n900 and start from there.