2007-JULY-11: Yeah, I hate those things;
half the time they don't work, or timeout,
and you lose all the text you entered.
(Maybe you don't lose the text on these wikis,
but on most commenting forms you do).
Usefullness score: low.
Annoyance score: super-high.
Some of the words have lingatures/accent marks: no idea how to enter those...
Also, I tried the audio version of Captcha here on a wiki, and it didn't work.
Thanks for giving us the option to disable it;
has the FAQ been updated with the disable option info?
\- cisco_kid