Oh yeah definitely a pause and continue conversion feature is much needed as well now that you mention it!
I have already posted the jobs queue save/ load ability a couple of months ago: Jobs queue save/load feature
Compared to the pause/continue ability, which has to be able to stop the conversion and pick it up where it left it, what I am asking is even simpler.
Its just a matter of exporting a document (xml or json for example) that lists each video on the queue and its encoding parameters.