So my Droid 2's power button stopped working a little bit before I got my Thunderbolt, and I ended up giving it to my girlfriend (she had an Eris...)
Anyways, I learned a few tricks along the way so I could root, SBF, and enter recovery without the need for the power button, and I thought I might share the info for people with the same problem who might not know what to do.
I've come to the conclusion that the Droid 2 does not need a power button for it to be fully functional. It is only there for convenience.
1. So your power button doesn't work and you need to turn the screen on? Easiest thing to get around.
Simply slide the keyboard open and the screen comes on.
2. So your power button doesn't work, and your battery has died or has fallen out. How are you supposed to turn the device on without a power button?
All you have to do is plug in the phone to an AC charger, and the phone should come on.
Sometimes, however, it will show the boot logo, then go to a screen showing you your battery percentage, and not actually boot. No problem. Just pull the battery and unplug. Replace the battery, and while holding the "x" button on your keyboard, plug the phone back in (be sure to keep holding the "x" button until a triangle with an exclamation point appears). Your phone will reboot into recovery (if stock recovery, press the magnifying glass). Simply unplug the phone, and choose to reboot, and poof, your phone is on.
3. So you need to SBF, but don't know how to get into the bootloader without the power button?
Simply plug the phone into your computer. Sometimes if the phone is already off, it will automatically boot into the bootloader. However if the phone is already on, just use the ADB command "adb reboot bootloader"
If your not good with ADB, simply pull your battery, replace it, and while holding the "up arrow" on your keyboard, plug the phone in and it will reboot into the bootloader.
4. So you've done the SBF, but now you need to wipe data/cache to stop a bootloop?
Like before, simply plug the phone in while holding the "X" button on your keyboard and you will boot into stock recovery.
So there you have it. A way around everything the power button is needed for. I'm sure a lot of you already knew this information, but hopefully this will help some that might not already know.
Last night I was trying to fix my girlfriends phone, and forgot how to boot into recovery without the power button, and felt very hopeless. That was the inspiration to write this little guide.