Just might be a $400.08 mod. Please be careful. A laptop powers it's USB ports via a surface mount micro miniature fuse. Fry the fuse, USB gone forever. Laptop will probably survive. Check out the link from a Dell support forum (if it's on a forum it's gotta be true, right?). USB spec is 5 volts at 500ma. Real close to the normal operating condition of the cigar. What if something goes wrong?
dell inspiron 9200 USB failure - DELL COMMUNITY
The Rocket, saving your money is my pleasure.
A USB add on card might be available for your desttop:
something like this
http://www.newegg.com/Product/Produc...82E16815201023
or a PCMCIA card for your laptop like this
http://www.newegg.com/Product/Produc...82E16839101111
You burn up a cheap part if you screw up.
Man, I hate to keep editing this but,
Look at most "good" pass throughs, You use the USB to charge a battery that supplies the atomizer with power (what a pain). The really cheap ones seem to power directly from the USB port.