Jessyink [1]is really a very nice extension to Inkscape to enable doing dynamic presentations, I can really recommend it! There are two versions, I use the latter, Jessyink 2.0.0-alpha1.
However, I usually end up adding effects and manually setting the order and eventually running out of numbers. E.g. I start to number the effects by 10, 20, 30, etc. but soon end up having orders 1, 2, 3, 4, ... and wanting to insert a new efect between e.g. 2 and 3. Therefore I wonder, is there some way to renumber the effects to make some space that I have missed?
Footnotes: [1] http://code.google.com/p/jessyink/
For completion and closing this out, a renumbering and reordering function is now available as an Inkscape extension in the JessyInk trunk on launchpad.
https://code.launchpad.net/~jessyink-team/jessyink/version_2