Much earlier in the year Microsoft released a HTML5 enabled Bing Mobile site for iPhone and Android, and promised to release the update to Windows Phones also when they finally got a HTML5 enabled browser.
Now that Mango is available to 100% of Windows Phone 7 users (except maybe the recalcitrant Samsung Focus 1.4 devices) the Bing search team must have felt confident enough to push the button, as visiting m.bing.com now produces a completely different experience than before.
The app is now fetchingly dark and slick, and features much of the built-in options found on the Bing app in Windows Phone 7, including the backgrounds
Of course even HTML5 is not as fast as a native app, and while the site is now much more visually attractive it does not offer anything more than the dedicated app.
Give it a spin however and m.bing.com and let us know if there is anything we missed.
Thanks Milad for the tip.