Current developmet tree has kernel 2.6.20-1.2936.fc7 which has atl1.ko network
driver included (CONFIG_ATL1).
Please include this driver in the initrd.img to be able to do network
installation with this onboard card.
This will be in the next build of anaconda. Thanks for the report.
As of http://lwn.net/Articles/221245/, there will be more NIC to add. Not sure
if in current devel tree so I'll reopen later if I'll found something to add.
Thank you a lot for now.