I have a Flex App deployed, I'd like to track IP addresses which download the .SWF file, or even just put in a simple hit counter. Can someone reccomend a technote or web example I could look at?

If you just want a count of the numbre of times the SWF was downloaded (and the
IPs), then add that code to your wrapper or just look at the hit logs. Google
Analytics is also an easy way to see what kind of traffic you're getting.

matt horn
flex docs

By wrapper you mean the HTML file? Because they are currently just going directly to the SWF

Is there any way to do this within Flex?

Yes.
In your swf, when it is first loaded, you can send a server request to a script (say PHP) that opens a 'hitCounter' file and increments it, ++count.

Thanks much appreciated.