If you’ve been playing with the new .Mac webmail application, something under the surface very significant is present, but you’d probably never realize it. In fact, if it weren’t good works like Jon Hicks’ expose-mf.css browser stylesheet (view the above image without the stylesheet), you’d probably have no idea that beneath the surface, Apple was quietly giving a nod to an upstart open source community.
Given the source code that I’ve been provided, I can confirm that Apple has indeed added support for hCard in .Mac webmail, though not without a few errors (notably the ‘n’ optmization).
The significance of this can certainly be understated at this point, as few applications are built to take advantage of microformats browser-side (adding address cards that are already in your address book to your address book doesn’t make much sense) however, with Greasemonkey and other ideas like GreaseKits making the rounds (okay, so I came up with GreaseKits), we can count this as yet another feather in our cap as more and more large vendors make their web properties more semantically rich, opening up possibilities previously inaccessible given the sheer cost of maintaining one-off scrAPI techniques.
Now when you write a script to parse, augment, enhance or “user-interface-ize” microformatted content, it will work everywhere that microformats show up — not just one site at a time. With Firefox 3 looking to add support for microformats, it’s positive support by folks like Apple that will provide fertile ground for what the next generation of mashable web services looks like.
Factory Joe 
Wow. That seems like a faster adoption rate than normal for Apple when it comes to new standards and formats. Go Apple!
Excellent wrap-up, Chris.
This is excellent news.
/me raises glass to the µFormats crew and contributors…… slurp!
I dont know.Yahoo is Yahoo.