To assist in development and bug/feature tracking (both for myself and users) I have installed Mantis Bug Tracker.
It can be accessed at http://bugs.stevewilford.co.uk or using the Issue Tracker link to the right. You will be able to track progress on upcoming versions of published apps, and report issues or feature requests on existing versions.
You don’t need an account to view existing issues / features but you will need to register to be able to report issues or submit feature requests.
You can still report issues in the usual ways; leave a comment on the appropriate app page on this site, via email, or iTunes.