I have now been using it on an old XP machine w/ out a single lost connection yet. I think it may have been interfering w/ the iBook G4 because it was on as well at the time. can you not have multiple devices connected at the same time?

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iPhone 3G (sorry Sprint, I have been to the mountain top!) <-- Sprint Mogul PPC 6800 (not enough memory) <-- PPC 6700 (loaner from sprint) <-- PPC 6600 (no EVDO) <-- G1000 (no SMS) Cardo Scala-500 BT
I'm rockin Verizon Fios baby! 20Mbs is dumb fast! http://www.speedtest.net/result/295783856.png