I've seen a number of people who either have their N900's not stable with a "stock" OC profile like ULV, LV or ideal.
The -proper- solution to this - and in fact, all OCing - is to test it at each voltage/speed combination, adjusting the voltage until its perfectly stable. This is done on Desktop chips, on your GPU... why not here?

I think its because it appears too long or too complex an issue to deal with. Loading a default setting's so much easier than crashing your N900 9-12 times getting the settings right.

What I propose is a simple shell script.
The user will set the max OC they want to have tested, and the script will get to work. It will:
1. Starting at 200mhz, lock to that frequency and stock/above stock voltage.
2. Play a 1-minute video via mplayer that takes the entire CPU and still drops frames(fully loaded).
3. Drops the voltage by 1, repeats the video.
4. Repeat step 3 until the system crashes.
5. On next boot, it will take the last - bad - value, up it by three. This will be a stable, minimal value, and should work fine. The script will then go onto the next voltage and repeat. *

By the end, this script should end up with a profile that's about as low as possible, while still stable.

Would anyone be interested in using this?
You can figure it would take a dozen reboots and an hour or so to find best, perfectly stable settings.

*Note: I intentionally left out some technical details in the script description. I know exactly how this would work, but I see no reason to do it if it won't be used.

-Rob