Hi,
I'm in the just about the exact same position, cant help a whole lot w/ javascript, but php software/hardware/bandwidth, documention, testing, etc I'd love to help with and have a fair amount of time to do this in.
I'm interrested in helping on the project too, if you need me ; I think I've some skills on PHP, MySQL, xHTML, CSS, and a little Javascript, and I'd like to add some functionnalities about LDAP support especially. I know that it is not a RC goal to become a groupware, but I think it's worth to be developped (sometimes I got some returns from people interested in my patches off-list). But I can help on other aspects of RC, depending on the needs.
Thanks again for the great job on the project !