Yahoo! recently built and deployed to the IE 8 Gallery two very useful Accelerators! Now with the Yahoo! Map accelerator you can at any web page while browsing plot an address or location using interactive Yahoo Maps and with Yahoo! Search accelerator you can get text search suggestions.
Read the full blog post on Raj Ramabadran’s blog at http://rajramabadran.wordpress.com/2008/12/10/yahoo-internet-explorer-8-accelerators/