How will I get USB 3.0 ports on my computer?
There are many different ways. The mainstream way is through buying a new computer after USB 3.0 has become more widespread. A new computer will come with USB 3.0 ports on the motherboard, but this won't be until probably the second half of 2010.
If you don't want to buy a new computer, you can upgrade an existing computer one of two ways. The more costly way is to upgrade your motherboard to one with 3.0 ports on it, but this can potentially mean buying a new CPU, RAM, etc. Some motherboards are already available with USB 3.0 ports on them. One such board is the Asus line of P7P55D-E, which costs around $220. Gigabyte also has a few motherboards out (P55A series) with 3.0 spec included in a similar price range.
The easier and less costly way to upgrade is by buying a PCI Express card that will have 2 to 4 USB 3.0 ports on the back of it. These will cost less at around $30-60 once they go on sale.
Windows 7 does not include any USB 3.0 drivers as of yet, but Microsoft has said they will be included in a future update. No word yet on availability of drivers for Windows XP or Vista.