Just a quick note:
We just posted a Preview build of Adobe Data Services 4.6 on http://labs.adobe.com that now includes an all-native Android SDK for real-time Messaging (pub/sub), Remoting (RPC), C2DM Push and App State Awareness.
RTMP (Real Time Messaging Protocol) and the regular HTTP channels are supported, using AMF data encoding/decoding, a highly efficient and powerful encoding for complex and deeply nested object graphs. RTMP is supported natively by companies such as F5 Networks devices.
If you aren't familiar with Data Services, it powers some very large online gaming shops as well as the real-time trader desktops of many of the world's largest banks and financial institutions today. Hopefully this new release will be useful to the Android developer community at large. Data Services is capable of pushing up to 400,000 msgs/s out over a 4-hop double-F5 config (F5-DS Edge Server-F5-DS Endpoint Server) with an avg latency of just 15 milliseconds, and the NIO-based (vs Servlet) channels enable up to 50,000+ simultaneous active connections, perfect for MMO games and apps.
Check it out! We'd love to hear your feedback and ideas.