Our article, "The Foundations of Fortress iTunes", covered what the entertainment industry sees as the challengers to Apple's dominance in the digital media download market: SpiralFrog, Zune, PSP and Connect, MP3 cell phones, MySpace and MTV Urge. We forgot to include one possible candidate: Sirius. As in the satellite radio. And just like the other upstars we covered in Part 1, a Wired.com reporter speculated that Sirius is looking like an assault on Fortress iTunes, too.

Remember Sirius' Stiletto 100 portable satellite radio and MP3 player that we featured last month? The company also announced an online subscription - "satellite-free" - service called Sirius Internet Radio (SIR). As mentioned in Part 1, iPod and iTunes were the perfect partners to capture an entire market for Apple. Yeah, well SIR isn't iTunes. The latter is an online media store. SIR's an internet radio service that streams CD-quality music and selected talk channels.

Enter Yahoo! Music, one of the partners of Stiletto's manufacturer, Zing. Stiletto 100 will reportedly work in conjunction with SIR and Yahoo! Music so that listeners can choose to purchase-download the song they're listening to. As announced by Bob Law, senior VP of Sirius, "The market for digital audio on-the-go is exploding. We are working with Zing to expand the availability of Sirius content on new platforms and bring the best in satellite radio programming to an increasingly mobile audience."

In other words, they're making Sirius and the Stiletto into an iTunes-iPod teamup of sorts.


And there's more after the jump: guess where the CEO of the Stiletto's manufacturer worked before.