Fun fact: I only just heard of hi5.com but apparently it’s all the rage with the kids and funky cool cats of the internet. Not really it’s just another social networking site. However this might be relevant to your interests if you’re interested in free to play sports themed Sega games, as Sega’s new football game is free to play on that site.
To be honest I doubt this is relevant to your interests, but I think it’s kind of cool that actual game developers are putting out so called ‘casual’ games on these types of sites. At least they have a tiny chance of being a little bit better made. Probably not though. Just a thought.