I just found out about Yahoo! Open Shortcuts. This is SICK!!!. Yahoo! has done it again. The excerpt below is taken from the FAQ

1. How do I use it?
2. Do you have some shortcuts that are ready to use?
3. How do I create my own?
4. How do I manage my Open Shortcuts?
5. Is there search meta word trigger?
6. Can I name my shortcut the same name as a default shortcut?
7. I've got feedback about Yahoo! Open Shortcuts. Who do I tell?

1. How do I use it?

   Type an ! (exclamation point) followed by the name of the shortcut in the Yahoo! Search box.

   !shortcut_name

   Examples:

   !my to navigate to "http://my.yahoo.com"
   !wsf to search "weather san francisco" on Yahoo!

   For shortcuts that search favorite sites or start an Internet application, you can also type optional term(s) after the shortcut name.

   !shortcut_name term(s)

   Examples:

   !ebay lamps to search for "lamps" on Ebay
   !mail bill@yahoo.com to send email to "bill@yahoo.com"

   
   

2. Do you have some shortcuts that are ready to use?

   These popular shortcuts are available for immediate use:

   
   

   Navigation
   !clist	http://www.craigslist.org/
   !my	http://my.yahoo.com/
   !mysp	http://www.myspace.com/
   Search
   !amazon	http://www.amazon.com/exec/obidos/external-search?mode=blended&keyword=%s
   !audio	http://audio.search.yahoo.com/search/audio?p=%s
   !ebay	http://search.ebay.com/search/search.dll?satitle=%s
   !flickr	http://www.flickr.com/photos/tags/%s/
   !image	http://images.search.yahoo.com/search/images?p=%s
   !mw	http://myweb2.search.yahoo.com/myresults/ourresults?p=%s
   !news	http://news.search.yahoo.com/news/search?p=%s
   !php	http://www.php.net/%s
   !shop	http://search.shopping.yahoo.com/search?cop=mss&p=%s
   !video	http://video.search.yahoo.com/search/video?p=%s
   !wiki	http://en.wikipedia.org?search=%s
   Application
   !note	http://notepad.yahoo.com/?v=161&DESC=%s
   !mail	http://compose.mail.yahoo.com/ym/Compose?login=1&To=%s

3. How do I create my personal shortcuts?

   To create a navigational shortcut, use the keyword: !set with your shortcut name and destination URL.

   !set shortcut_name URL

   Example:

   To create a shortcut named "ff" to go to Yahoo! Sports Fantasy Football,
   Type: !set ff http://football.fantasysports.yahoo.com/f2

   To create a common search shortcut, use the keyword: !set with your shortcut name and the query.

   !set shortcut_name query

   Example:

   To create a shortcut named "watx" to search Yahoo! for "weather austin texas",
   Type: !set watx weather austin texas

   
   

   To create a shortcut that searches a favorite site or starts an Internet application, use the keyword: !set with your shortcut name and the destination URL. Within the URL, substitute the query term(s) with the "%s" placeholder.

   !set shortcut_name URL_%s

   Example:

   To create a shortcut named "yf" to search stock quotes on Yahoo! Finance,
   Type: !set yf http://finance.yahoo.com/q?s=%s
   

This is extremely useful. I've been wanting a short cut for searching Wikipedia on popular search engines for quite a while. Just for this feature alone I can see my usage other search engines dropping.