No i meant adding capability to read e-mail or sync calendar/contacts via EWS/ActiveSync on an IMAP server equipped in your webmail similarly to the feature offered by for example Horde.

Re-read your post. Looks like you meant accessing an EWS capable server like OpenChange from our webmail. Anyway, no plans for that because percentage of such installations in comparison to overall IMAP-capable boxes is so tiny that it can be ignored.

There are no plans for that. Also, usually if people already have Exchange server, they use OWA as webmail client. Using third-party client (like ours) does not seem to be a popular option in this case.

I can see MailBee with EWS support is out. Would Afterlogic webmail also support EWS? So that we could access e-mail on a Unix box via EWS?

Beta with EWS support is out! You can get it at:
http://www.afterlogic.com/forum/forum_posts.asp?TID=7192

It includes trial key, Nuget link and the documentation file.

You'll also need to install Managed EWS dependency from Microsoft (Microsoft Exchange WebServices package).

There is a sample which shows many aspects of working with EWS, including sending a mail, getting folders and messages. You can find it in MailBee.EwsMail.Ews topic of the documentation.

Still working on it, can't really tell any ETA for now, we'll let you know once beta is available.

Is there anything moving on in this matter? Can't wait to see ActiveSync :)

Any chance for a status update?

Most likely, later this month.

any timeline for beta and final release?

Alpha version is already in Nuget. Will release beta soon.