WEP is very easily cracked because the key never changes. WPA uses a single pass code - but the encryption key constantly changes so it is nearly impossible to "sniff."
YEah, I don't do a lot of cracking - ok none- but last I heard, they had figured out a way to inject packets or some such thing to increase the traffic and they can bust even an underused AP using WEP in minutes.
Not that I'm an expert on how they do it, but the way I look at it, why even risk it. The number of devices out there that don't support WPA is pretty low these days.
I use my home computer just for email/info/net etc etc-I dont run a home business I dont do a lot of ordering stuff online so even if someone cracked my WEP whats the worse they could do and what would be their goal?
The worst case scenario is the fuzz showing up to seize your computers because someone has been using your network to relay spam, or spoof paypal pages, or download kiddie porn, or pickup 12 year old girls, etc etc. You could get your Internet services turned off if soemone goes around violating the TOS doing whatever. You could lose all your data to a virus. You could have someone watching your Internet usage in order to see when you do use your credit card.
I would think the average WEP cracker is your teenage neighbor. Now maybe all they want to do is get a faster connection for WoW, maybe they want to send threatening emails to kids in their class, but I don't think it's worth taking the chance.
I have a customer who insisted on giving out his administrator password to every $5 employee that walked through the door. Eventually he got a call from the police wanting to know why he was stealing credit card information form paypal customers. When I looked into the situation, it was such a tiny simple scam page injected into his web server that it occurred to me that it could be run from any computer anywhere.