http://forum.feed-the-beast.com/forums/texture-packs.46/
Don't know why I didn't think to look in those forums in the fist place.
Looks like my favourite texture pack John smith has been hacked together but will soon get official support from the original author.
Just be careful not all of them are up to date and you may end up with some performance issues.
I was using a cobbled together Sphax edit that barely worked and bogged my machine down something fierce, Direwolf20 put together a much better version (though incomplete) and it works great, I think I posted a link in the main FTB thread, I'll post it here again later.
I posted the forum like because many of the threads provide feedback on the state of the packs.