Microformats hCard and hCalendar Used for Web 2.0 Conference Speakers
Tantek has posted new microformat favelets (bookmarklets you put in your browser's toolbar). The microformat favelets available are: Copy hCards; Copy hCalendars; Subscribe to hCalendars; feed Copy hCalendars (beta); Subscribe to hCalendars feed (beta). Look at Tantek's Web 2.0 Speakers hCard and hCalendar blog post to understand the power behind this.
Microformats are one of the ways that sites can make their information more usable and reusable to people who have an interest. If you have a store and are providing the address you have a few options to make it easy for people, but a simple option seems to be using the microformat hCard (other options include vCard and links to the common mapping programs with "driving directions").
There will be more to come on microformats in the near future here.