Using WAY too much power while sleeping?

I am completely sure that before, my 2008 Mac Pro was using 3 watts (give or take a few) while in sleep mode, which is why I've left it running day and night pretty much since purchasing it. (Power useage based on the digital readout on my "smart" UPS backup.) However, just this afternoon I noticed that it seems to be generating a considerable amount of heat, even when not in use, and my power bill has been abnormally high (like twice what it should be), and nothing can really explain that since virtually nothing else runs in the house for any amount of time. Needless to say, I decided to check the UPS readout while the system was asleep. To my surprise, 175 watts were being consumed while the system had been asleep for hours! No wonder it's been hot in my office, and why my power bill seems to have been going up considerably higher than usual! I've got a power hog sitting here running day and night consuming nearly full power 24x7! (Full power reads about 200 watts, displays off, at idle and 275 watts with displays on at idle.)
Any suggestions on what could have gone wrong that is keeping my system from taking a power nap? I really don't want to power it on and off day in and day out (it gets restarted as necessary). And the Apple Care coverage just ended several months ago. Ugh!

LOL Looking at the console may have answered my problem. It seems that the xrite device manager for my ColorMunki (screen calibration device) is going bonkers, trying to "start" itself every 2 seconds, give or take. But I thought for sure that I've uninstalled this software to use another application using the same device. Clearly, it forgot to uninstall something that is asking to start but no longer exsists.
Here's a snipplet:
9/2/11 11:37:02 PM    com.apple.launchd[1]    (com.xrite.device.colormunki[14665]) Exited with exit code: 1
9/2/11 11:37:02 PM    com.apple.launchd[1]    (com.xrite.device.colormunki) Throttling respawn: Will start in 10 seconds
9/2/11 11:37:08 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message[14666]) posix_spawn("/Library/Application Support/X-Rite/Devices/message.app/Contents/MacOS/message", ...): No such file or directory
9/2/11 11:37:08 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message[14666]) Exited with exit code: 1
9/2/11 11:37:08 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message) Throttling respawn: Will start in 10 seconds
9/2/11 11:37:12 PM    com.apple.launchd[1]    (com.xrite.device.colormunki[14667]) posix_spawn("/Library/Application Support/X-Rite/Devices/ColorMunkiDeviceService.app/Contents/MacOS/ColorMunkiDev iceService", ...): No such file or directory
9/2/11 11:37:12 PM    com.apple.launchd[1]    (com.xrite.device.colormunki[14667]) Exited with exit code: 1
9/2/11 11:37:12 PM    com.apple.launchd[1]    (com.xrite.device.colormunki) Throttling respawn: Will start in 10 seconds
9/2/11 11:37:18 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message[14668]) posix_spawn("/Library/Application Support/X-Rite/Devices/message.app/Contents/MacOS/message", ...): No such file or directory
9/2/11 11:37:18 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message[14668]) Exited with exit code: 1
9/2/11 11:37:18 PM    com.apple.launchd.peruser.501[216]    (com.xrite.device.message) Throttling respawn: Will start in 10 seconds
9/2/11 11:37:22 PM    com.apple.launchd[1]    (com.xrite.device.colormunki[14669]) posix_spawn("/Library/Application Support/X-Rite/Devices/ColorMunkiDeviceService.app/Contents/MacOS/ColorMunkiDev iceService", ...): No such file or directory
9/2/11 11:37:22 PM    com.apple.launchd[1]    (com.xrite.device.colormunki[14669]) Exited with exit code: 1

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