Thanks Torben and Don,
Torben: are the api issues referred to in the bug reports acs core changes, or an effect of the shift to postgres 8? Do you think I'm best off starting with 5.1? (I have a very tight deadline)
Don: I used to have commit rights (user marka) but they either disappeared or I have forgotten the password - if you could re-add me that would be great.
First priority will be basic functionality, but I'd like to refactor it enough to use existing core modules like categories. Gradual pragmatic refactoring should let me get quite a lot of useful functionality out I think.
Ps: it seems the email replies from my blackberry disappeared - I guess forum email replies are turned off.