Devel works for 2.3???
I doubt it, I review all the updates.endian.org/devel repository, and all files are dated as 25-May-2009, that is way before EFW 2.3 comes out.
I did a fresh install and use the efw-upgrade, but nothing is installed:
root@firewallVirtual:/usr/local/bin # efw-upgradeLoading cache...
Updating cache... ######################################## [100%]
Fetching information for 'efw-community'...
-> http://*:*@updates.endian.org/devel/repodata/repomd.xml
repomd.xml ######################################## [ 33%]
Updating cache... ######################################## [100%]
Channels have no new packages.
Loading cache...
Updating cache... ######################################## [100%]
Computing transaction...
No interesting upgrades available.