Hi Kostya,
Thanks, I'm also interested in Activesync. Our corporate (60.000 people) mail server has EWS enabled when we are in the intranet, but outside of company, only Activesync is enabled due to policy enforcements. So for the moment, I'm using other clients that support ACtivesync, although I would buy Aquamail anytime if it had Activesync.
I guess there are other users in my situation.
PS. for corporate use, I would also need calendar sync and at least GAL search from People app.