[From Hans] How are iPhone / iPod Touch apps different from that of software for the Treo / Centro? Well according to Steve Jobs, "Steve Jobs told USA Today that the Apple App Store will launch with "more than 500" applications Thursday night for the iPhone and iPod touch. Of these, 25% will be free and 90% (of those for sale) will cost $9.99 or less. "This is the biggest launch of my career," said Jobs. Analyst Tim Bajarin at Creative Strategies said, "When IBM introduced the PC, it was good, but it didn't take off until people started discovering the software." It's these apps then, he adds, that will "dramatically differentiates the iPhone" from Treos and BlackBerrys." Engadget after the jump.