This might be useful for those using Inkscape and know something about Beamer. If you don't know anything about LaTeX, then this is not going to be useful. From the project page
takes an Inkscape .svg as input, and generates pdf files corresponding to each of the layers and a LaTeX file that uses the LaTeX Beamer commands to incrementally overlay them.
If you use Beamer to make your presentations and Inkscape to draw, then this might be potentially useful though I daresay people would tend to use PGF with Beamer. PGF examples can be found here.