i too, am a long time n900 ower, in the face of iphone adversity, and android... something, not sure what yet, have made the Lumia 800 jump. picked mine up lunchtime today.
OVI/Nokia suite or whatever its called these days, has sync'd my contacts, i've even backed up my old faithfull n900, but i can't for the life of me yet, figure out how to get them onto the Lumia. the bluetooth xfer fails, and zune seems .. oblivious?

i can sync everything but my contacts. argh!

loving the lumia for everything else (so far) though.