Is it possible to find out how my website is ranked for a specific keyword? And I mean for organic search results.
I'd like to just enter a keyword and my url and get a ranking for Google, Yahoo, MSN, etc.

Is it possible to find this out somewhere?

Yes !
I have an exact solution to your problem.
But you will have to say thanks in advance then I will tell ( )
Assuming that you have said thanks, Here goes the link…..

Wait ! Do not click here before saying thanks.

http://www.mikes-marketing-tools.com/ranking-reports/