Welcome to the dark side. usually it starts with an ipod, then an iPhone, next an iPad. Not too many people get that addicted that they get an AppleTV as well.
But (Gulp) we have two ATVs, an iPad, 3 iPhones, two iPod touches, an iPod Nano, an iPod shuffle and an iPod so old that it has turned yellow. MacBook Air arrives this week - but we didn't buy it, daughter's school hands them out.
Don't want to think about what we've spend on iProducts - but the constant appearance of iTunes Music Store on the credit card statement is starting to make me think we need to go cold turkey for a month or two...still it is nice how this iStuff just works and nobody needs to have explained to them how to start using this stuff. The AppleTVs are is probably the easiest things of all to use.