The droid x can be tethered with Windows 7 using Bluetooth easily. Here is how to do it.
How to Tether Droid X
but PdaNet is slow - directly connecting to the DX's network has been amazingly fast for me
(my phone) + (me) =
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A gun in the hand is better than a cop on the phone.
Only the Skilled Survive
A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
Drill Sergeant Frick's Rules For Un-armed Combat.
1. Never be unarmed.
2. See Rule #1
USMC rule # 23 of gunfighting: Be polite, be professional, but have a plan to kill everyone you meet.
Nice! Just did this successfully with a MacBook Pro via its internal Bluetooth. When you get to the screen where is asks what sort of modem it is, you tell it its a Motorola and choose the 3g option from the pull down. Leave username and password blank. Speed test reported 0.8 Mbps down and 0.07 Mbps up.