Can anyone gives me a feeling on how much changes is expected in Version 3.
We are thinking of starting development from scratch within the next few weeks and wondering if it might be wiser to wait until version 3?
Are the changes basically just bug fixes?
There are some new features along with some fixes for existing issues. Since everything is going to be compatible (except for relatively minor changes) there is not really a need for you to wait to start devlopment.