I walked by this place about 3 years ago while making my way from Geno's to Center City so I think it's on 10th Street, and it's before Washington. It's a small Mom & Pop shop (literally) where an elderly couple make the best cannoli I've ever had to order - it takes forever, but it's worth it. They have a small kitchen in the back where they make the cannoli shells. The owners appear to be in their 70s or older, so I hope they're still around. I'll be in Philly on business all next week and I'll find time to stop in if they are still around.
I'm from NYC and there is no place like that here - it's in a class by itself, so I know plenty of you guys must know about it. Thanks!