Pretty cool, Mike. Check out this video of Roger O'Donnell (keyboard player for The Cure): http://livestre.am/EXIg. At about 4:45, he uses something similar.

>Steps to reproduce:
>
>Go to Amazon App Store
>
>Click on "Music" category.
>
>Observe this page:
>
>http://www.amazon.com/b/ref=mas_lftnav_Music?ie=UTF8&node=2478849011&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=browse&pf_rd_r=07YVAM1Q6QVFFGZJP6EC&pf_rd_t=101&pf_rd_p=1344110422&pf_rd_i=2350149011
>
>Observe the Draw Music MonadPad icon, representing the "Instruments" sub-category.
>
>Observe that the "Test Drive" feature at Amazon has been reactivated for this app, so you can test it out on your computer.