From: Sydney, Australia
Well, quoting from the March update, the remaining tasks appear to be:
1. Add in missing elements such as TMR.
2. Finish PBEM testing.
3. Tune the AI
4. Release Version 1.00
... which leads me to a lot more confidence in where they are at with this game than, say World in Flames. Here it appears that they have a working AI that needs tuning, if you read in betwen the lines in the WIF forums then you'll see notes like "well, we are starting to think about the AI design".
Which, to me, says that EiA is probably due inside a year to two years, whereas WiF is more like 3 - 5 years time frame. Speaking as an ex-AI developer, the process of developing an AI is a very complex thing, and lots can go wrong during the development.
Anyway, I'm looking forwards to the release, it seems that the game is almost playable from the last set of screen shots we saw, just wish they could get a few more developers onto the tasks remaining to get the process out the door.