Installed Mac OS X Leopard from USB Drive
That was easy. Too easy?
First of all, it's a shame I have to reinstall Mac OS X. But it got slow. And I hate it when my OS is cluttered and gets slow. I reinstalled Windows XP every month back in the days. Leopard only lasting about one year is pretty lame. Bad Steve!
The installation itself was trivial. Put install DVD in iMac, open Disk Utility, plug in USB drive. Use "restore" function to restore the DVD to a partition on the USB drive. Wait 20 minutes, finished. It then took me hours to back my stuff up and another 35 minutes to install Leopard on the MacBook Air (counting from reboot to ready desktop).
All in all it's pretty easy to reinstall, and I already have all my apps registered and documents in place. It's a shame you have to reinstall, though. I liked that about Mac, that I didn't have to do that. Now I do.
Good part: not having a optical drive is even less of a problem than I thought. Now I always have my install DVD with me. Could even put it on a thumb drive (needs 8gb) and put it in the wallet or something.

