After much deliberation I decided to take the plunge and install Ubuntu on my laptop today. It's a basic HP Pavilion sporting an AMD Turino64 processor and an nVidia 7150m graphics card.
Then I got cold feet and decided I did not want to repartition my hard disk and run the risk of trashing my existing Vista install, too much work there. I opted to use Wubi, a Ubuntu installer that uses space on an existing Windows partition and adds a dual-boot menu.
http://wubi-installer.org/...