Does anyone have any recommendations for a reasonably priced AC adapter for an Alu Powerbook? Apple's is a bit expensive IMO. I've read some good things about iGo, but that also seems expensive and I don't need something that can connect to multiple devices. The MacAlly adapter looks to be reasonably priced, but I think I read somewhere that it can cause problems on the Alu PB because it does not have the third prong for ground. Anyone have insight/experience with this? Any other adapters you can suggest? Thanks in advance for your help.