Today Google officially made Android 2.0 available to developers and along with it a new SDK, toolbox and APIs for them to use in crafting their apps. Google also spilled some details about the features that are now going to be part of Android. Some of the goodies include support for multiple Gmail and Exchange accounts.Any developer interested in snagging the new tools should open their existing SDK and update it. That should be all that's necessary, at least according to Google. Aside from all the exciting new tools and APIs that developers will have access to, there are some excellent new features included in the next version of Android. Here's a quick breakdown:

• Support for multiple Google and Exchange accounts
• Third-party "sync adapters" allow apps to tie in to the phone's sync services
• Quick contact menus for fast access to specific key pieces of contact information
• Unified email inbox
• SMS and MMS search
• Text message auto-delete after a user-defined thread size is reached
• Significantly improved camera controls with white balance, macro, effects, and more
• Improved keyboard layout, dictionary, and algorithm based on multi-touch support
• Double-tap zoom in browser, support for HTML5
• Bluetooth 2.1 support with addition of OPP and PBAP profiles
• "Better" graphics hardware acceleration

Some of these are really exciting. The improvements to Android's messaging capabilities are what entice me the most. Being able to have a unified inbox within Android will make managing multiple email accounts less painful. Also, those who use more than one Google or Exchange account can rest easy, as support for multiple accounts is now standard.

I am also glad to hear about the big changes coming to Android's camera controls, which have long lagged the competition. And who's not excited about HTML5 support?

We know that at least one device this year -- Motorola's Droid -- will be running Android 2.0 out of the box. Hopefully others will hit the market with 2.0 on board, and the existing crop of Android phones will be able to update to the latest version of Google's mobile OS.