This also doesn't work for me, you must have a weak filter at your school fedor...but as an example:
going to the whois site that fedor listed, and typing in imdb.com brings you here:
http://whois.domaintools.com/imdb.com
looking a little ways down under "Server Data" there is an entry for "IP Address" which in this case is: .
72.21.211.32:
The Internet Movie Database (IMDb)
This IP address can be used interchangibly with the domain name. Evidently, the filter fedor's school is using, is only blocking domain names, and not the corresponding IP's.
Edit: well I had to come in and edit this to add the IP address. Evidently Kong added a module that auto looks up IP addresses for you and replaces them. Clever.