Hmm will wait to see what the changes are, since my PC works fine and stable so far.
Edit: Found this on the ASUS site, by the "BIOS History" link:
[1009]
----------------------
1. Fixed System MAC/UUID will sometimes lose when AC Power lost
2. Add AI tuner Option under AI Booster to set Auto or Standard
3. Support changing SATA/RAID mode individually in the Bios
4. Add new memory frequency of 216,233 or 250 MHz no matter memory SPD is(E series support only)
5. Hidden ECC DRAM Support option when DRAM Doesn't support ECC function
6. change OnBoard GLAN1 option "Auto" to "Enable"
7. Adjust PowerManagement Default/power on option
8. Show PowerManagement option at APM option