*cough* I've bought a pair (I've been working a lot lately so I thought I deserved one ;-) and let me tell you, without the cellphone it's as much fun. I've been playing for two days and still discover new things! Especially the connection with inernet is much fun.
I'll try to tell you a bit about it. You raise a tama just like a normal one, only there's no disciplining this time. When you want to connect to the pc, your tama gives you a code, which you can enter at:
https://e-tamago.com/pc/flash/tamago.html Each time it's a different code and your tama character will appear in the city as the same character on your Cho Jinsei.
Now you can go to the kindergarten, gotchi king, shop and play glames. When you play games you can earn money or a present. If you go to the market you can buy stuff that makes your tama happy (like a tv or radio) or ingredients to cook! I just found that last one out and think that when you make a good combination you will really prepare something and/or your tama will learn from it.
Other than that there's a nany which will sing for you (super cute!). When you grow up you will go to school. Also you get mail, which might be random or triggered, I'm not sure about that. And in the mail you can even get money/points! Anyway I hope to figure out more and will put it on pixelmood soon. Have a great christmas!