A prerelease of 1.1c is available in the 'development' package. The source zip, binary zip, and installer are all there. - http://sourceforge.net/project/showfiles.php?group_id=59143
The prerelease has new support for map units other than meters (feet, km, miles; others can be added). In addition, the options for non-standard map units and false-offsets are now available in the ArcView 3.x extension.
Support for additional projection engines (i.e. PROJ.4 or ESRI PE) will "not" be added in this release, but may be added to a subsequent release if there's interest. I will look for interest by checking the "Feature Request" tracker periodically. - http://sourceforge.net/tracker/?atid=490052&group_id=59143