I will be visiting at least four of my schools (pending acceptance). Right now the schools I will definitely visit are Texas, MIT, Berkeley, and Minnesota. If any of the last three fail to accept me I will visit Georgia Tech and Washington. I think 4 or 5 schools is a pretty solid number and definitely will make the semester go by a little quicker!
Just wanted to chime in. I got into UT-Austin with a 3.772 GPA. I have 3 years of research, 1 pub and another on the way. GPA isn't everything!
EDIT: I too can confirm UT sent out all of their invitations. The graduate adviser told me that they wanted it all finished before the new year.