Just posting to say that I had success running Android-x86-4.0-RC1 on the
Dell Mini 9.

Most importantly, I replaced the Broadcom Wifi card with an Azurewave
wireless card based on the Atheros AR5B95 chip. I imagine an Intel based
card should work well too. I know this might be a stumbling block for some,
however $20 will save you a lot of headaches when it comes to running any
non-Windows OS on any laptop. I can't imagine swapping out this card would
be above the abilities of anyone bothering to install Android on a Netbook.

Working:
I was able to stream Pandora from my WPA2 AES encrypted 802.11g network,
web browsing works well too. The Sleep, Volume, and Screen Brightness keys
work.

Not working:
A lot of apps are listed in the market as being incompatible with my device
(Including Flash Player), but not all. This could be due to the device
profile in the Market (which could be incorrect), or perhaps they are only
compatible with ARM devices? If I find out more I will post it here.
The screen brightness slider in Settings does not affect the LCD's display
brightness.
The WiFi Toggle and Mute function keys do not work.
When the laptop locks and Android goes into "Sleep" mode, Sometimes the
laptop will actually go into standby, and sometimes it may sit on the lock
screen and not respond to mouse or keyboard input until it is "woken up" by
momentarily pressing the power key once. If the laptop actually goes into
standby it can be woken up by pressing the power key, but once back at the
lock screen you need to momentarily press the power button one more time in
order for Android to allow you to drag the unlock bubble.
Apps rotating to portrait - probably the biggest annoyance. Rotation Locker
helps, but some apps are still flip the display to portrait, requiring you
to switch to rotation locker and force the display back to landscape.

All of that being said, I believe Android-x86-4.0-RC1 will be usable for
me. YMMV.