Since my 32gb
SSD is on backorder, and I've read about several people here managing to get OS X onto the 8gb
SSD, I went ahead and did it last night. Here's what I did:
I used the iDeneb 1.3 distro, because it's 10.5.5 out of the box.
It doesn't have any of the drivers we need, so I downloaded the driver packages from the InsanelyMac Dell Mini 9 thread and installed them.
I run monolingual, I ran xslimmer, I deleted all the apps I don't plan to use (calendar, contacts, ichat, many many more), I went prowling around the hard drive deleting other things, such as all the screen savers, all the desktop backgrounds (those two alone freed up the most space). Turning off sleep mode seemed to free up 100megs, for some reason..
Type this in terminal:
sudo pmset -a disablesleep 1
Anyways.. It's all installed now, and I have just over 1gb free. I'm using 5.84gb out of 6.83gb. I had about 300megs free after the installer completed. I haven't installed any apps yet.
Good luck with your install, it can be done, but it's not the most comfortable place to live.