I attended the Hellenes Online Demo on Monday night, and I really enjoyed the walkthrough. My thanks to Craig and Joel; you guys did a great job showing the game off.
I'm familiar with Hammer of the Scots, so I was able to catch on to the familiar block game mechanics easily. I like what Craig has done with routing in the combat system. I really like the sea movement rules (including risky deepwater areas and the highly defensible narrows) and the ability to appeal to the the Olympians. If you haven't checked this one out, I recommend you have a look.
GMT's Hellenes Page
I think the online Vassal demos that GMT is doing is a great idea, and I'll be attending every one that I can. I am "Josh S." on Vassal and the GMT Ventrilo Voice Server. There may be another Fields of Fire demo on Friday, April 24. I'll be there if there is. I hate that I have missed all of the others. I wish there was a good way for them to record these things so we could see the demos we miss. Maybe a screencast? I've watched a lot of programming tutorials where they've captured the action on the screen as well as the audio commentary. Sounds like too much trouble, though.