Maybe this isn't the best list to discuss grid cluster software, but I'll see...
Oracle has discontinued the development of the open source Sun Grid Engine. It is currently distributed in Debian 6 in packages beginning with grid-engine-* The open source fork continues as Open Grid Scheduler. http://gridscheduler.sourceforge.net/ I can't tell what grid-engine-* packages are using for upstream as it refers to SGE, something both upstream sources have in common for package and current releases. Is Debian basing grid-engine on the new open source project? If so, I'd expect the grid-engine-* project might remain around and it will eventually update to the more recent releases from gridscheduler. Alternately, the grid-engine used Oracle's SGE as the upstream and this package will soon be EOL. If so, will there be a new package based on Grid Scheduler?