Meta search, subject directory, site feeding and wiki

Meta search can be useful when you don't want to search the same thing from multiple search engines. It compiles similar results from a few search engines and displays it in one or a few pages. Thats the advantage. The disadvantage is that it may not be as accurate as you want it to be and most of the time there will be irrelavant results.

I also learnt how to do site feeding. i linked some of my friends to my blog using the atom feed. Now there are links on my blog that will bring you people to my friend's blogs! This is very useful in my opinion as people can blog surf without having to type in any blog addresses.