Why pay Apple $69.99 when you can build your own Lion install drive for the App Store purchase price of $29.99 -- plus the cost of an inexpensive thumb drive. Here's how to create a full install on a drive, not just the recovery disk that we recently posted about.
You'll need a copy of the OS X Lion installer. If you saved a copy when you first installed Lion, great. If not, you'll need to re-download it from the Mac App Store.