The Linux Phone Standards Forum (LiPS) released its mobile Linux spec. On the heels of the first half of the spec that it released in June, this version includes APIs covering telephony, messaging, calendar, instant messaging, and also new user interface components.
Although this group hasn't received the attention surrounding Google's Android announcement, the LiPS enables users to create different and interoperable implementations. Android is only one implementation of Linux.
Expect to see implementations of the standards shortly.