Currently Being ModeratedNov 10, 2012 3:29 PM (in response to NortheastGuy)
There are two ways to erase a drive.
(1) Regular erase: probably what you have already done.
(2) Secure erase: a more thorough erase (not needed unless you plan on giving your CPU to an experienced programmer/hacker).
For tips, I recommend this article: http://www.mactip.net/how-to-securely-wipe-your-mac-hard-drive-before-selling-it /
Currently Being ModeratedNov 10, 2012 5:14 PM (in response to NortheastGuy)
I see there is a Mac OSX Base Install disk(?)
That's your Recovery HD, which you boot into to erase or secure erase the Macintosh HD partition which contains OS X, settings, programs and files.
It and/or the PRAM may store WiFI settings, as it's supposed to be able to connect to the Internet for download Hardware Test and OS X in 10.7 or later machines.
I'm trying to figure out where its storing my wifi settings, etc.
Head to System Preferences > Network > Airport > Advanced > Airport and use the minus sign to delete previous Wifi's and their passwords.
Is there anything besides erasing the drive / partition(s) of the hard drive to clean a Macbook?
Yes to a certain extent.