I was on the chat at the Writing to Publish chat room last night. Writing to Publish isn't specifically a F&SF group, but I think I was able to help. There were probably a dozen people there.
I finished up "Ed Sullivan Show Magic" and it went in the mail today. I ran it past the Baen's Slush and got a couple of good critiques before completing it. I may run my next story by another critique group, though, just to spread the pain.