Bit of an update for those interested: Blender roadmap 2.7, 2.8 and beyond http://code.blender.org/index.php/2013/06/blender-roadmap-2-7-2-8-and-beyond/
UDIM Feature for Blender branch released. Its going to be added in the master branch in 2.81: https://blenderartists.org/t/udim-support-for-2-8-by-lukas-stockner-development-thread/1114538/118
2.8 Has a release date for October 20th! For everyone who is making plugins, they are looking to have the API finalized on September 19th https://80.lv/articles/the-release-date-of-blender-2-8-revealed/
I am having this issue in Blender with bump map painting. Has there been any efforts made to solve this issue? https://cgcookie.com/questions/10569-texture-paint-bump-map-in-blender-2-8