Seems to be working fine so far. I'm not sure which "1.22" I have. The release notes have 1/22/09 but the version tag on the admin screen is 1/5/09.
I was experiencing wireless connection drops across different G clients (laptop, Wii, Roku, etc.) with the 1.21 and 1.20 rev which have been eliminated with this version so far (only 4 hours of testing of course). I was going to back down to 1.1x today after troubleshooting several hours last night...good timing.
UPDATE: Still having occassional wireless drops on 1.22. Annoying but I can deal with it untill 1.22 is released again for me to test. Seems this is a common issue with dozens of possible causes and solutions based on other posts.