We're using WebCT Vista. WebCT has officially ceased to exist, but this is definitely not Bb. We're promised Bb8, which looks like quite an improvement.
I'm studying in Moodle and think it has several advantages over what we've got at work. I'd like to see more options for skinning though, particularly at course level.
We have selected Angel and are in the initial stages of getting it configured for the University. More on that later. Moodle was interesting but too difficult to support at my institution.
Interesting, our university looked at Moodle but determined that we didn't have the infrastructure to support it and add on to it. If something breaks it is difficult to re mediate quickly. We had to look for a hosted solution that integrated with our Institution's database.
I'm not sure there is a perfect solution, but the enterprise scale company hosted LMS comes pretty close.