I thought it might be useful to give a bit of background on what this forum is for.
3DRobotics have just released a set of telemetry radios based on the Si1000 chipset. The ArduPilot developers (particularly Mike Smith and myself) have been working hard on the firmware for these radios for months now, trying to make them ideal for APM telemetry.
These radios are unusual as they are open source and extremely configurable. That means that there is a lot of scope for diydrones members to get involved in tuning of the radios, and in adding new functionality. That is what this forum is for.
The Si1000 chipset has a huge number of configuration registers. We've spent quite a lot of time selecting the best register values for use with APM, but there is still a lot of scope for more experimentation. For example, I'm planning to do a test flight soon to see if enabling manchester encoding gives better or worse range at various data rates.
Similarly, there is a lot of scope for adding firmware features to make these radios link really well with antenna trackers and other radio add ons. We've already got them talking to APM in a much more advanced way than an Xbee can, but there is a lot of scope for taking it even further.
The basic theme is that these are DIY radios. We've put together functionality to make them work really well already, but the real potential is from the community getting involved to make them even better.
So get involved, and let's bring to telemetry radios the same sort of community development that has made ArduPilot so much fun to be involved with!