It doesn't matter what element of home, food or fun you're interested in, chances are there's a good page about it on Wikipedia. Most people are now familiar with Wiki, to the point perhaps where some are being cynical and saying it's 'old hat' but I think it should be 'hats off' to Wiki for it's a fantastic resource when you're looking for an introduction to a subject. Long may it continue.
The biggest compliment perhaps and endorsement of what Wiki has achieved is the fact that Google has now launched Knol - their own Wiki-type resource. Except of course that they claim it will be built along different guidelines. Well, I for one will be watching its growth. Hopefully, it won't rival Wiki but actually act as a complimentary resource. Having two great information sources available for free is even better than what we have now. Bring it on!
Here's Wiki's page on Knol
Here's the official Google Blogspot post announcement of Knol