Hi!
Well, the idea is to keep developing it and to always have a stable version (currently 0.1.2) and a beta version with newer features but maybe somewhat less testing.
The current beta version is 0.1.3 beta 2. It has proven to be stable so I can recommend it for download. It has quite a large number of added features since the last version I announced here. Among which:
[ul][*] Support for add-on aircraft, including a full-function aircraft editor to modify or create your own.[*] Support for glider towing[*] Much improved weather & wind model that allows for slope soaring[*] New aircraft including retractable landing gear and flaps[*] Possibility to change the time-of-day/sky
[/ul]
You can download the latest beta [link=http://rcdeskpilot.com/beta]here[/link].
You can already find a couple of dozen add-on aircraft on [link=http://gunnerson.homestead.com/files/rcdp_models.htm]ggunners page[/link] or on [link=http://www.rcgroups.com/forums/showthread.php?t=1102829]RCGroups[/link].

I haven't made a trailer yet to showcase these features, but here are some videos from during the development:
[link]http://www.youtube.com/watch?v=myIRFY8Pag4[/link] (slope soaring)
[link]http://www.youtube.com/watch?v=hX8Wg-bNy2s[/link] (glider towing)
[link]http://www.youtube.com/watch?v=nHy73xujk3A[/link] (aircraft editor)
And a screenshot:

Cheers,
Davy