We have released 1.1 beta, which has many small improvements, new features, and bug fixes.
If you want to try the 1.1 beta release and report on your experience it would be great. There are 114 tickets closed for this release so far: view tickets.
unzip over your current piwik files (you can make a backup before for added safety)
visit the Piwik reports and the admin screens
test for at least one day and view reports. Is it all working as expected? any data error? and any other feedback please let us know in a new forum post for each question or feedback