A trend that Roo and I have noticed in conversations about all things virtual world/metaverse and Web 2.0 is someone will try and compartmentalize into age ranges. Metaverses are only for the kids who are used to video games. We also had the recent discussions on blogging and age. Kids blog older people dont/wont/cant.
I think now we have hit the conceptual age, rather than the information age, it is no longer anything to do with an individuals phycial years on the planet.
In metaverses we see older people saying "this is what the internet was supposed to be". We see people who have never played a game entering into a 3d environment and moving around. Initially not as quickly as a PS3/Xbox player, but they get it quite quickly.
Age is not the issue, it really is state of mind. You want to share things, share them, blogging is not technically hard, facebook does not need an instruction manual. Flickr needs you to operate a camera, not worry about a computer.
All these things free people to be creative and concetrate on the content. It is true that the older you get the more stuck in your ways you may get, but equally it is when you are after more quality in your life, when you are younger you just will try anything, maybe not stick with it for life, but learn patterns that can be applied anywhere.
So the technology is not an age barrier thing, its a mental state of mind and attitude to things that people often will retreat into the stereotypes of comfort.
Just a thought, but one backed up with a lot of anecodotal evidence, people who Do Web 2 tend to have the same sort of mindset and willingess to share. Some may be sharing wisdom, others ego. Either way its not a young thing/old thing/male thing/female thing etc..... Its different types of people respond to different things.