Riding a wave of momentum, the folks over at Android decided to give the world even more to talk about with today’s release of Donut, the new v1.6 Software Developer Kit (SDK). Donut is an upgrade from Cupcake, the previous v1.5 SDK.

According to a blog entry at the Android Web site, Donut gives developers access to a number of new APIs. The SDK features support for additional screen resolutions, including QVGA and WVGA, as well as gesture APIs and a text-to-speech function.

Most notably, the new Android SDK supports both GSM and CDMA cellular technologies. Cupcake only allowed for GSM. Opening up CDMA support hastens the inevitable – the arrival of more Android devices on Sprint and Verizon Wireless.

Sprint announced earlier this month that it will begin offering the Android-based HTC Hero on Oct. 11. Not surprisingly, today’s blog entry said that developers can expect to see devices running the Donut as early as October.

Until Sprint made its announcement, T-Mobile USA was the lone pioneer of Android in the United States, taking on the first device based on Google’s open-source platform in the form of the HTC-built G1. T-Mobile currently offers both the G1 and its successor, the myTouch 3G.

Just last week, Motorola unveiled its version of the Android handset in the form of the Motorola Cliq. That device also will land exclusively with T-Mobile USA.