I haven't bugged Alec about this for awhile, but honestly, why not negotiate with someone to do a port? Apart from a small amount of time to negotiate, you really don't have to do anything. The Linux community would jump at the chance to beta test a Linux version of Aquaria. Look at World Of Goo - the moment that was playable, we got on, worked with the porter and the Linux version of WoG came out just fine (just like the win version - he even did the things we didn't like just to make it exactly the same

)
So really, Linux users gain a port of a frickin' great game and you gain some profit on every unit sold (still got my money ready for 2+ copies here).
All that being said, I'm sorry to hear your last six months haven't been good for you in the life department. Hopefully things are looking up for you or will soon.
Beemer