Search Engines and Microformats

I've been searching for any information about the degree to
which  
search engines currently take advantage of Microformats for
indexing  
content.
Can anyone tell me:

• When crawling pages, do Google, Yahoo!, or MSN recognize
hCard,  
hCalendar, or other Microformats, and if so, do they do
anything with  
them (populate local search indexes, shared events
calendars, etc.)
• I know that Yahoo! publishes a huge volume of content in 

Microformats, but do Google or MSN as well?
• Are any employees of the major search companies
contributing to  
Microformat initiatives?

Thanks in advance for any info you can provide.

Aarron
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