The release version of Heimdall Suite 1.4.0 is now available after an epic wait. You may remember hearing about this version of the suite way back in October when the release candidate was first announced. That's quite a slow pace for the last steps toward a stable release, but it sounds like the time was well spent. XDA Recognized Developer Benjamin Dobell cited problems with packaging and squashing outdated content as the main cause of delay. He hopes that the work he put in here will mean shorter development cycles for future versions.
What can you expect from the upgrade? The Heimdall Suite is a tool for flashing firmware to your Android device. Its origins can be traced back to the need for a cross-platform flashing tool. But it's much more than that now. One of the most notable additions is support for a wider range of Linux distributions, having only targeted Ubuntu in past version. Of course it still retains its ability to run under Windows and Mac systems. Also notable is added support for recent Samsung offerings like the Galaxy S III. There are several new backend features for developers like addressing partitions by name.
For a concise list of noteworthy changes, read the Release Announcement. Binaries are available from the Product Page with the source code residing in a GitHub Repository.