I had a bit of time over the holidays and decided to implement a data grid in the UN Job List. You can play with it at http://unjoblist.org/beta/
It allows for easy sorting of vacancies and even further (real time) filtering on the result page. If this data grid works I will start to replace all UN Job List tables with this one in the future.
Also, I modified the layout of the UN Job List slightly so that it becomes more obvious what a link is (blue hover color) and which links have been visited. I hope this makes the vacancy research a bit easier.
Let me know in the comments if you have any feedback – thanks!