My Apple Pro Mouse just died. Too much strain on the short cord finally did it in. OK, I've been wanting another mouse, but I have a couple of questions here. I've seen enough people here swear that Microsoft mice are the best thing to get for a Mac, so I'll go for it. But first ... Does anyone know how many mice buttons OS X can support? (I'm running Jaguar.) I'm looking at the Microsoft optical mice and am a bit confused about this. I know I can use a 2-button mouse with OS X, but is two the limit? A 3-button mouse looks sweet, but I'm not sure if I'd just be wasting money, as I can't find any info at the Apple site about how many mice buttons OS X can support. I'm also interested in the MS optical trackball. It does have OS X support. Anyone ever used this thing? I did once use a non-optical trackball on a PC and found it to be quite comfortable. I don't know if an optical trackball is worth a damn, though. Any advice, experiences, etc. are much appreciated! Thanks.