Whenever I visited NeoItems.net I always saw little "featured GoPets items" and GoPets banners. At first I ignored them, as I've trained myself to do to adds. But then, yesterday, my curiosity finally got the better of me and I clicked on the link.
GoPets is actually a really awesome site. You create a pet, either a Cat or Dog, choose its name, colours, etc and then loggon to the GoPets server. (You have to download it, but its all completely free) You then fill out info about yourself and your interests, and begin to make friends from all over the world. Once you have some friends, you can send your pet over to visit them.
You see, your cute little pet comes and sits in your desktop (or a special little window if you prefer) and you can feed it, bathe it, pat it and buy it toys to play with. Other pets can then come and visit your desktop, either sent by your friends, or roaming randomly when their owner goes offline (as your pet will do). You can also buy cute nameplates, awesome little accesories and clothes for your pet.
Here's a link to join if you want to just check it out:
http://www.gopetslive.com/inviter?leviathan
On a completely off topic note, which probably doesn't belong here really... I think that if Neopets combined with GoPets it'd be the most awesome thing ever! Just think about it, your pets could all roam on your desktop, you could bring out food and drink for them to eat, toys for them to play with, their petpets (and their petpetpets) could follow them around or play with them. And you could play all the games and collect things just like normal. You could also finally have a use for clothes and other accessories, and you could easily make tons more friends. (It hasn't even been 24 hours since I joined GoPets and I have 30 friends already!)