Apple has raised the price of its only known full-length film available on its iTunes Music Store, High School Musical, from the standard $1.99 up to $9.99. Several reports yesterday noted the existence of the Disney movie, and some industry watchers say the movie may signal an attempt to test the waters before Apple officially delves into offering full-length feature films via its online store. In late February, analysts began speculating that Apple might debut its first full-length film on iTunes. February 28th brought the company's special event, but it failed to produce the expected service to the disappointment of many. A study surfaced just days later from a California-based market research firm that asked participants numerous questions related to a potential "iTunes movie service" which would provide on-demand access to movies, further suggesting that Apple is planning to unveil full-length feature film downloads in the near future.