Love To Have Mobile Themes For Multi-siteWordpress/Buddypress

More people are going to use iPad 2 and tablets and smart phones, and so I think it's best for us all to be able to allow visitors with mobile phones and similar gadgets to use our Multi-siteWordPress/Buddypress in mobile friendlier themes. It's best if developers here can actually provide codes that detect mobile devices and switch from regular themes to mobile themes whenever users are using mobile devices.