There have been lots of questions on the blog and message boards about orientation, housing, and the time line for getting information after making a deposit.
After the Office of Admission logs your deposit into our computer system, other offices can start to work with you. The very first thing you'll receive is your MyUva book (click for a PDF version) from the Office of Orientation and New Student Programs. The very first thing you'll want to do is activate your computing ID. See that MyUVa link for online information about that. After that, do some reading. Talk to your parents about orientation dates and make plans to come to Charlottesville for that. On the Summer Orientation site (first menu item on the main orientation page), you can find all sorts of info about what happens at orientation, who should come, etc.
The Orientation & New Student Programs site also has info about move-in weekend activities (called Fall Orientation), Family Weekend in October, and other activities for first-year students.
Hope that helps!