Changing from 7610 to 3230 or 6680 - transfering contacts, etc.

[twr7cx]

I just swapped my 6600 for a 7610, and wasn't sure if there was an easy way of transfering the contacts and calander details over, so I sent them individually through bluetooth - which was a success, but bloody pain stakingly long.
Now I wasn't planning on getting the 7610, it was a spur of the moment think, and a direct swap for the 6600, how could I say no?
I was looking at a 3230, but now I'm thinking about splashing a bit more for a 6680 (as the 3230 doesn't seem to be that much of an upgrade over the 7610) - might wait a month or two to see if theres any drop in there price first now that I have the 7610 to tie me over till I can afford the 6680.

But what I'm wanting to know is there any easy way to transfer this data over to the new handset, be it 3230 or 6680? I have an IRDA adapter, bluetooth adapter, and data cable for the 7610 (presumably the compatiable with 6680 and 3230 aswell?) - how ever no drivers were included with the data cable (was free), so I havn't got it working yet.