The very first milestone for virtually every bitcoin web service would be a login/user management system.
I thought it would be nice to have an open source, "peer-reviewed", off-the-shelf system that you could just drop into your project and be reasonably sure that there are no major screwups there. And we all know how badly this is needed
Now, is there such a library already?
Maybe some other (not-bitcoin-related) off-the-shelf library? (googling for it right now)
The problem is that for this library to be easily reviewed it should be small and simple, but yet usable, extensible and flexible to support various types of web services.
I'm not even sure such library is feasible...