I went with the Palm Centro since it has an actual keyboard. I have an iPod Touch and am fine with the touch-screen only on it, but I would prefer to have keys on any phone I will be suing for an extended period of time. Just a personal preference...

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)