Charles Simonyi is the 5th space tourist currently sitting in a Soyuz that will dock at the ISS in about 3 hours.

Charles Simonyi led development of Microsoft's Word and Excel, which apparently made him a billionaire, who can afford to travel into space. 58 year old Simonyi worked from 1981 to 2001 at Microsoft and calls himself the first Nerd in Space.
Mr. Simonyi has setup a great site where you can follow his trip. Currently they feature video of the blast-off of the TMA-10 Soyuz and in about 3 hours you should see footage of the docking on the ISS.
Visit the Charles in Space blog for live video coverage and more from the Simonyi space trip.
In 2001, American Dennis Tito became the first space tourist.