Obligatory Public service Announcement: WEP is very easy to crack. There are many articles posted around the web on how to hack it's encryption keys. Do not use WEP unless your router provides no other choice.
WPA2 is much more secure, just as fast as WEP and available on most modern hardware.
Just a friendly piece of advice trying to make the Internet safer, one device at a time.
Well Shitums ~ now I wanna know what I have! How do I find out?
Sorry for the mini-hi-jack. Wrecklass's fault.
I'm definitely no expert on security but when I used wep I had a big long series of letters and numbers and when I used wap2 I got to choose a phrase as the key...