Question For The WPA Experts

I currently have a WRT54G on a home network.  I am using WEP.  This is convenient for guests with laptops as they simply need the key and SSID.  If the network is changed to WPA will things remain as convenient?  I don't understand how the rotating key would work with a newcomer after several itterations.  Thanks.

just an added info:  
when some adapters or the softwares of such adapters don't support the wpa, what you can try to do is to update the software or use a windows xp service pack 2. If your PC comes with service pack 1, you just need to update that to the service pack 2...
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    Attachments:
    Multi-Function-Ctr Retrigg Pulse Train Generation for AI Sample Clock Mod.vi ‏182 KB

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