I don't recall patches specific to the v1, just the bcm5354 in the v2 and the wl520gu.
This http://forum.openwrt.org/viewtopic.php?id=15443 thread has lots of discussion about v1 problems, but they are all fixed in the current svn. I wouldn't give up on the b43 driver and the card that comes w/ the v1 so soon.
I have an engenius emp-8602+ that works in the v1. However, at least for me, the ath5k driver is still a work in progress. The ath5k-devel archive will give you an idea of its status. The other Atheros alternative is the madwifi driver, but it uses its own 802.11 stack and I don't think its being worked on any more. I've gone back to the original Asus card and the b43 driver for my v1.