There is no forum that's just for Gallery support. This one is profile support.
Try the site feedback link at the bottom of the specific Gallery page. You can also file an internal help ticket (since you're a Microsoft employee). Email me for more info.
There's a forum for general TechNet. It looks like all the Gallery issues are discussed there:
http://social.technet.microsoft.com/Forums/en-US/tnfeedback/threads
I'm moving this to the Where Is forum, since I'm answering where to ask.
Thanks!
Ed Price (a.k.a User Ed), SQL Server Experience Program Manager (Blog,
Twitter,
Wiki)