Is there a tool that...
 

you can put in your domain and it can scan google to see what page you show up on for a keyword?

google analytics has that

Uh.. analytics will show you traffic keywords your getting off organic search... but position of keywords is actually in Google Webmaster Tools. :2 cents:

http://www.nnteenmodels.net/gfy/webmaster_tool01.png

http://www.googlerankings.com/

Isn't bad either. Use at discretion. As with any of these tools tied to google.

if you're looking for where you are listed based on a list of preselected keywords..
http://www.webposition.com/

That said google webmaster tools does a great job at listing where you are.. but does not pull from a given list of words...

You may bookmark google analytics.

Thank you for all of the answers!