We are consistently hard at work on developing Infinite Flight adding and improving content. We understand the excitement for new content, but are not able to make release date promises. We try have updates every few months or so. We are a small team, and it's very difficult to be certain of when anything can be released.
Too much can and often does change at the last minute to cause a change in plans. That said, we do not offer dates or estimates of any potential release.
We do offer previews or sneak peeks of things being worked on and these can be found on our social media sites like our Infinite Flight App facebook page and twitter.
You can also visit our official Infinite Flight Community Forum at: http://www.infinite-flight.com/ for progress reports on what we are doing and engage with other fans from all around the world.