The T610 was also my first GSM phone. I loved it dearly, and unlike Jen up above, I think that his successor doesn't look half bad (though, sizing it up with a nearby ruler reveals it to be significantly larger than its namesake, if those measurements are to be believed).
As a current iPhone owner, this is likely the only thing at the moment that could draw me away from the ooh-aah toy department that is the 3G iPhone.