http://www.khoapda.com/index.php?tt=...&productid=201

this site can unlock Unlock your T-mobile/AT&T / Cingular Blackberry Remotely Without Software or Cables

Model supported :

T-mobile USA : 6230, 7230, 7290, 7100T, 7105T

AT&T and Cingular :5810, 6210, 6280, 6710, 7100g, 7210, 7230, 7280, 7290, 7780, 8700c

Another model that they offer remote unlock :

Cingular Treo 650 , HP iPAQ 6510, HP 6515,HP 6315, Sidekick II, Blackberry 8700c, SonyEricsson W600i, 2125 Smartphone, 8125 Pocket PC Phone...

Hope this can help!