Mint and Peppermint
I have used Peppermint and Mint on Dell D610 and D620 laptops. Found all of the drivers on install. I did install with a wired connection, but the wireless worked on first boot. I have had zero problems.
The Peppermint machine with a centrino chip and 512 of RAM runs fine. It goes without saying that it is up and running before a two year newer XP machine can ask for a password.
Mint is a full fledged distro, it includes everything. Peppermint uses GoogleDocs as its office suite. It took about ten minutes to drop OpenOffice on Peppermint and make me happy. I am not a fan of GoogleDocs.