I have a small form factor PC which has an SSD and NO CDROM which I'm trying install Ubuntu 10.10 onto.

I tried to copy the ubuntu-10.10-server-i386.iso to a USB Key using unetbootin but when I started the install it complained of needing to find a CDROM and would not progress past it's desire for a CD Drive.

So going back to http://www.ubuntu.com/business/get-ubuntu/download I followed the instructions (go figure) and found that it recommends to use "http://www.pendrivelinux.com/downloads/Universal-USB-Installer/Universal-USB-Installer.exe"

Now I'm happily installing and should be finished shortly.