I must admit that I think Clearbooks is great but you are absolutely hopeless on communication. There is a news section which would be the perfect place to post news on new developments but in the last 2 months there have been 2 entries on there - one of which is to announce the news section!
I realise that web development is fluid (it's my job!) and that things are moved in and out of the release version all the time depending on management priorities but you must know what is going in a release a least the day before it hits the live system (or otherwise how do you do the testing?).
Could you not tell your customers that a release is imminent (even to say "during the next week" if you don't want to be specific) and give a summary of the new features and/or bug fixes which the release will contain. At the very least, please produce a release note after the release goes live.
I've asked before about some general indication of which feature requests are being considered but management doesn't think this appropriate for some reason but it would be good to communicate changes which are just about to be made or have just been made - it would cut down on your support calls for a start!
Thanks for a brilliant system - please just let us be part of making it even better. It currently feels if the community section is just a way to fob off your customers rather than a way to develop a real sense of community!