I wanted to see who is the most active contributor at the moment. To do so, I counted (or rather, had the database count) the numbers of edits per registered user.
The outcome can be found at [[Wikipedia:Most active Wikipedians]].
1 Maveric149 12995 2 Andre Engels 6287 3 Bryan Derksen 5978 4 AxelBoldt 5802 5 Koyaanis Qatsi 5002 6 Ed Poor 4849 7 Tucci528 4620 8 Jheijmans 4477 9 Brion VIBBER 4069 10 Zoe 3853 11 Eclecticology 3667 12 The Anome 3581 13 Tarquin 3577 14 Vicki Rosenzweig 3273 15 -- April 3155 16 Ellmist 2798 17 PierreAbbat 2654 18 Lee Daniel Crocker 2652 19 Isis 2651 20 The Epopt 2586
Note that in total we are slightly above 130000 edits, so Maveric did almost 10% of all edits.
Of course this is only a very rough measure of how much someone is working on the project - correcting a typo is an edit just as much as, say, extending a stub to a three-page article. Still, it seems that Wikipedia should hope and pray that maveric is not getting a life any time soon...
Andre Engels