It may be possible to do this in the DSDT. I noticed that on my Gateway, there are a bunch of control registers defined that (I suspect) interface with hotkeys to turn on/off various functions like wireless.

Take a look at the Notify methods and see if you can spot anything that gets notified on resume from sleep. Since bluetooth will be turned off when sleeping, it will need to be turned back on if it was already on. So you miht see some logic to that effect, testing the state of a register.

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MacBook Pro - have allergy to nickel in the aluminum casing. So my kid gets an expensive toy!

Gateway MX 8738 - Retail, vanilla Snow Leopard 10.6.2 (thanks kizwan!) with Chameleon RC4, modified DSDT. Upgraded to Core 2 CPU (easy to do). Upgraded to 640GB drive. Everything but SD card working. Minor niggles. GMA950 with QE/CI and *no* artifacts.

iMac (luxo/lamp) G4 with Tiger.