I recently upgraded my own mobile from V600 to a SE K700i - I also have a SE T610 as my work phone, and have been a fan of Ericsson phones for years.
My iPaq 3970 would happily connect over GPRS via bluetooth with the T610, V600 and before that my T68.
So, the K700 will not, unless as I found out, I upgrade to WM2003.
well, my 3970 is pretty-much worn out now through daily use for 2 years, and I reckon it's time for a new PPC.
I guess I just need someone to confirm that the K700i will indeed work over b/t for a GPRS connection with WM2003 (which will of course come with a new PPC).