where do a student go on the banner website to figure out WHEN she register for classes?

Under the student tab there is a field for "registration status" and everything you need to know regarding that should be there! Let me know if that works for you!

I might be mistaken, but for most students, the registration for Fall 2010 is April 12...

Registration is based on class standings. Seniors register april 8-9, juniors april 12-13, sophomores are april 15-16 and freshmans should be right after that, I'm not sure the exact date but its probably around april 19th