Seam Security's X509 Certificate Support
You gotta love Gavin's description of why Seam should support X509 certificates:
I have no idea what these things are, but apparently people want to get them. Supposedly, they are nothing to do with certificates you get when you win something like a spelling competition in primary school. 'Cos if they were, we could have used Norman's PDF stuff. So anyway we can just steal code from Acegi. Then I can tell people "we've got a certificate for X509" in talks, and they will think I know what it is.
At least he's honest.
Update: Seam now has Spring support - very cool! FWIW, we talked a bit about Seam on the AppFuse mailing list today.