I'd still like people to report the differences, if any, that you notice between

hal-device bme | grep "percentage" | awk '{print $3}'
and
cat /sys/class/power_supply/bq27200-0/capacity

Meanwhile [sarcasm]thanks so much to everyone who read my request for dbus help and actually knew dbus enough to knows how to do what I asked.[/sarcasm]. I get that most people don't know dbus that well, and some might not have had time or had something impostant to do instead - but if you knew how to help and didn't bother, middle finger to you.

For anyone who cares, I figured it out, I would like to say that the script on the first page actually helped, so an indirect sincere thanks for that. So to all those who'd like to know how to use the command line to get accelerometer values and device orientation (as well as two other things) through DBus (which as far as I know is the only way to get device orientation directly):

dbus-send --system --print-reply --dest=com.nokia.mce /com/nokia/mce/request com.nokia.mce.request.get_device_orientation

From there, I've figured out how to combine grep and awk to get just the device orientation returned (though it's not exactly right for what I want, but I can figure that out a lot easier).

- Edit -

To the OP (who's name eludes me and I can't see because the edit mode doesn't show you previous posts), I'll try this script, or some tweek of it, in the near future. I will definitely be implementing the "lower-clock if temperature is critical" thing eventually - at least if I have what appears to be overheating problems.