Yahoo!

Searching the web couldn't be easier! Get the most relevant results through this web search engine mashup that combines the power of the major search engines and social bookmarking sites.

Showzey will collect all of your photos along with shared photos from your Gmail mailboxes, Facebook account, Picasa albums, and Flickr albums.
Now, You can share with your friends all your photos from Gmail mailboxes, Facebook, Picasa, and Flickr.
You can organize photos, share photos, copy them between sites, make funny captions, create RSS feeds and many more.
Goto http://www.showzey.com to take control of your photos.

Do multiple searches at the same time

TheDailySearch.com provides a Multi Powered Custom Search MashUp that aims to be an Agora (place of assembly) type search setting that serves not only as the starting point for your internet sessions but as a hub of activity and live community. TheDailySearch.com aims to change search by making users visible and encouraging conversation between its users by providing chat and popular videos for discussion right on the main page.

Many excellent tutorials for Pipes have been written by users, here are a few: