The best way to add Bluetooth to machines lacking the feature or to machines with older Bluetooth specifications is with a small USB adapter like the new Cirago BTA3310 or BTA6310. The 3310 has a range of 33 feet while the 6310 has a Bluetooth range of about 330 feet.
Both of the adapters are Bluetooth 3.0 compliant and support EDR with 2Mbps and 3Mbps modulation modes. The 3310 adapter sells for $29.99 and the 6310 adapter sells for $39.99 and both will hit stores by the end of June.