And finally, here is build 13360 already available from the official download page as TeamCity 5.1 release.
You can get an overview of the new additions in the What's New or review the full fixed issues list.
As usual, please backup before you drive.
Thank you for the continuous support and feedback.
You can prepare to vote for (and suggest) the new features as we are going to make up our minds on the next major release.