Yes Asphyre sources are available under Mozilla Public License Version 2.0.
But from what I understand about this licence you as developer must always alow users to obtain souce code bined by this license (you don't need to provide acces to your whole game). So until official site is up and running you can simply link to it, but if the site would went down I would have to provide the sources either by shipping them with my game or posting them somwhere on my site.
I may be wrong since I'm not expert on theese lincesses.
MPL doesn't require you providing source code. GPL does. With MPL you only need to provide changes you made to engine's code (if you did), not actual game code.
Well Yuriy, I too understand the need to focus on family, especially when there is "a little one" on the way. I'm a father now myself. You're in for some tough times, but even better those precious times too. Congrats to you and your growing family!
Asphyre is a great library and as long as it's kept somewhere I'm sure that it will still have continued use for some time still. I hope you will be leaving it up somewhere so that others can make use of a really powerful library even though it's development has come to a conclusion. If hosting ever becomes an issue an archive would be more than welcome here on PGD.
Oh how times they change... good luck on your other projects old friend.