A few discrepancies...
I can see a few confusing ideas that should be cleared up.
1.) iChat's AV capabilities have nothing to do with AOL's network. AOL wouldn't have to be involved in anyway for iChat users to use it's AV features.
2.) AOL's client for the mac has been utter crap. Apple did AOL a favor by creating their own chat client so AOL doesn't have to deal with such a small percentage of users. <opinion> To counter this argument, as to the number of features of the windows AIM software compared to iChat, it's been my experience that neither myself, nor any of my friends really used most of those features. Even something as simple as buddy groups often goes ignored by a good share of users. I believe it was Apple's intent to keep iChat simple and stable, leaving it to do what it was designed to do: Chat. </opinion>
3.) The mention of auto-configuration networking (Rendezvous) in reference to iChat and iTunes is an open standard based on IP protocols. Any OS capable of IP networking should be able to easily implement Rendezvous, although this really has nothing to do with the AOL chatting and AV capabilities of iChat.
4.) Firewire cameras do not require drivers for video transfer. This was originally the main purpose for Firewire, and the method for transferring video over Firewire is part of the Firewire standard. This allows for true plug and play. Makes you wonder if maybe Apple came up with it
5.) I personally don't think Apple would charge for iChat for Windows. The way the programming frameworks are for Mac OS X, it requires Apple to do a little extra work to get iChat AV to work on Jaguar as well as Panther, so I could see them charged for it to incent people to upgrade to Panther and to compensate for the few extra programming hours.
6.) Apple has made it very clear in the press, interviews, and even their corporate quarterly and annual reports that they are using iTunes, the music store, and even the iPod as layered "Trojan horse" marketing. Up until iTunes for Windows, Windows users couldn't get a taste of the Mac lifestyle unless they buy a Mac. Apple is providing a few small niceties to show Windows users how easy and powerful Apple software and hardware can be. Granted, typical estimates for these kinds of marketing tactics are only 1.5 - 2% of people switching, but with the success of the iTMS, Apple has proven they can take it further.
FYI: According to Apple's EDGAR reporting, they make the majority of their revenue from (in order of revenue) hardware, OS (server and client) licenses and professional applications like shake and final cut, accessory hardware like the iPod & iSight, and last and certainly least: .mac and the iTMS
<2 cents> It's my opinion that Apple should port iChat and market iSight for Windows. It wouldn't hurt Mac users in any way, it would add to the user base, and it may even get a few people to switch. </2 cents>
My kudos to centauratlas and jettredmont !!