Internal Geohot unlock switch
If you are going to be moding your iphone for Geohot's (& friends) nifty hardware unlock, I would install a small magnetic reed switch inside the phone. These are small cylinders of glass with two metal blades in them. When a magnet is brought near the switch, the contacts close. The reed switch would allow you to perform the hardware unlock technique without having to open the iphone case each time.
Connect the reed switch across the two unlock wires. Insulate it and the connections with tubing, tape, etc. Tuck the switch into whatever nook and/or cranny it will fit in. Ideally, you want to mount the switch away from the speakers and microphone so that your unlock magnet does not mess them up. Make sure you orient the reed so that your magnet will close the switch.
Whenever you need to close the "unlock" switch during the proceedure, just place a small, but fairly powerful magnet on the iphone case where you mounted the reed switch. You can usually scrounge a suitable magnet from an earphone.
Ebay seller FITZUGRT has some likely looking switches for sale cheap (10/$4). They are very small. You might also try places like Radio Shack or burglar alarm suppliers.
Full Hardware Unlock Of Iphone Done