I searched for microsquirt, but megasquirt stuff keeps coming up so its easy to get them confused.
In any event, if you go to
http://www.msextra.com and browse around, you'll see that micro/mega squirt modules are far more advanced than the ecotrons ECU. And VASTLY better supported.
Here are the
microsquirt schematics...
The source code is also there and even includes compilation instructions.
Although probably not recommended, it IS possible to build your own from scratch. And its even more possible for a 3rd party to repair a broken squirt since the architecture is open. Not only that, but I briefly looked at the source and it appears to be Linux based. That means that it could be programmed to do anything that any other Linux can do. (Think WiFi, USB, Internet, etc.)
I am definitely envious of that ECU.