Check out my links page.

Here's a list of places to find IP Locators

To look up information about IP address, check RIPE, ARIN, APNIC, and InterNIC for starters.

Per an interesting article on how to find anything on the internet and tips on this webpage, here are links to various search engines:

Google
FAST
Altavista
Lycos
Wisenut
Hotbot
Teoma
Excite

Useful Programs
TightVNC - remote monitoring program