I have an Intel PRO/Wireless 2915 Internal (802.11a/b/g 54Mbps) built in with my laptop and I have confirmed that it does/will work with Windows Vista.

I'd put it this way, I wouldn't run a server off a wireless connection, but for my needs, wireless suits me fine. I don't see what the big issue is. I have my main computer using a wired connection, but my laptop uses built-in wifi. Now if you are using an older wifi card you will notice a huge performance difference as far as reception. Someone I know used to experience problems all the time because they had an older laptop, and the signal would always drop.

Wifi is very convenient for alot of things. I'm sure someone has got it working on Vista. As I said, I have seen it working on integrated wireless for notebooks. Some of the external cards will just need driver support