There has been a very common issue with new Macbook users and wireless internet. If the user has a Netgear router (in my case a DG834G wireless router) and uses a WEP key, when setting up a new connection they simply cannot connect to the internet as their WEP key isn’t accepted, no matter how many unsuccessful tries.
What’s amazing is that the “fix” is actually quite simple, but something almost no-one could figure out on their own. All the user needs to do, is just put a $ in front of the WEP key when they type it. No hacks, no drivers, just a simple $.