WPA2 (or WPA-AES) and a 64-character password. It's not like people type in their network password every time they join the network. This is one of the areas there it's not that much of a hassle to use a long password since you normally just type in the password/passphrase when setting up the network connection (and people are possibly used to long, random-character passwords from using WEP keys).
On a side note: Long passwords are generally a good idea.
On websites that support it you can just type in a memorable phrase, with spaces and everything, and it will be more secure than the usual 10 char alphabet soup.
A password I commonly use is:
Length limits on password input fields suck donkey balls.
