I own one, along with my g5, mbp, and mb. It happens to be an acer aspire one 10" and I find it to be my only truly portable mac. We use the apple laptops around the house, but the acer is great for dropping on the front seat of the car with a movie or two on a SD card. 6 plus hours battery life, email, safari,itunes...under $500.00.
In a nutshell: Reformatted drive Installed 10.5.6 via a customized installer. The installer includes a bootloader to get around the efi issues Installed some custom kexts specific to the video driver, sound etc. Updated and am now running 10.5.8 on my AAO. I wouldn't say there are no issues, but for my purposes it works great. You can chose to dual boot with the original windows installation, but I decided to remove windows entirely.