I also hope to upload images (photos, diagrams, maps) that I'm working on to the Wikimedia Commons.
I actually signed up to write for Nupedia back in 2000 (on computing and geography topics), but obviously nothing I wrote made it through to the site... if anything ever did. I've joined the Wikipedia community in August 2005 and deeply regret not doing so much earlier. I am constantly amazed and astounded at how the Wikipedia works, and deeply committed to helping this incredible project evolve and grow in any way I can.