I'm completely wireless around the house, yeah even a PSP so I can surf ARFCOM in the "Library". Sometimes my legs fall asleep I'm in there so long.
And on the road if I'm being cheap I will pull into the parking lot of a hotel with wireless service and surf ARFCOM, do some banking, surf more ARFCOM, that sort of thing.
If you want to have your eyes really opened get a wireless signal detector and use it in some of the places you find yourself on a daily basis. You'll be surprised at what you find out.
There are a lot of Starbucks coffee shops around here and the trendy thing for them to do is set up wireless networks to draw regulars that want to surf and drink joe. Some other smaller businesses also have them, like local sandwich places, the weirdo Hill area in Seattle is practically crawling with signals.
Most are not secured, because they're being purposefully shared (i.e. college kids) or set up by yuppie dumbasses that just want convenience and get plug-and-play setups... skipping the security.
Caveat: don't wardrive... that's slang for driving around and snooping around unsecured systems.
That's wrong.
Most Linksys stuff comes with an upgraded version of WEP (WPA), use it. My wife used to hunt hackers for a living, her coworkers had some horror stories about WEP vulnerability. BTW, I use Linksys and it's hacker-hunter-wife approved.
One last thing about wireless that's overlooked. Remote storage and print servers, you can hook up specially-made "servers" to your printer or large hard-drive to use them remotely in your home. They use the same security that your network does (on the same key) and can be tucked out of the way where you won't have to see them. Print something up without having to hookup the laptop again, and hide that ugly printer.
Have fun.
My .02.