I don't personally have the time or interest in the GWT port. However,
I am willing to offer CVS space within the main Joda-Time CVS.
I can see three approaches
1) fork here
2) fork within the Joda-Time CVS
3) alter the original Joda-Time codebase to add conditional
compilation and a separate jar file output.
While the last is theoretically the best, I am concerned that I
wouldn't be able to test it or release it without someone else
verifying the GWT part.
The difference between #1 and #2 is simply where the code resides. If
it is here, I'm happy to add a link to it.
It looks to me like forking here is the simplest option, unless you
want it to officially be 'Joda-Time GWT' (still maintained by you)
Stephen