Updated 7/18/2010: I believe that all the functionality I’ve wanted for this project is fully incorporated! Go to this page (http://www.dongarber.com/flashassets/guitarsolo/guitarsolobacktracks.html) to play your very own guitar solo in A minor pentatonic, in either blues or metal guitar amplifier effects, and with a bluesy or a hard rock backing track to inspire you to create some jams!
I’ve had a load of fun working on this project. It’s a solo guitar playing application, using ActionScript 3. My newest added feature: two amp models, Blues and Metal. Click the image below to go to the application’s webpage.

Click the toggle switch on the Marshall amp to select either a warm bluesey tone, or the shredding of metal!
I’ll provide an in-depth look at the actionscript I wrote to create this app later. I’d like to give out thanks to two folks: Gary Rosenzweig’s video tutorial at FlashGameU.come made developing my toggle switch an absolute snap to code. And Travis Roof, whose awesome drum application I found a few weeks ago served as the spark for me to create my own guitar playing actionscript application.
Also, kudos and thanks to for his excellent discussion about Reacting to Certain Key Presses (assigning keyboard presses as event triggers). AS3 supports only a few keys by name, and to specify which individual keys you want to use as function triggers, you must determine their keycode. I learned about this here.
It’s Not Finished Yet
I want to add a few more features: A backing track to jam to; some more amp models (sounds), maybe some string/note animations.