I probably won't make changes in the near future, but I've been thinking about the captcha issue, and I wonder what people think about reCaptcha.
Where reCaptcha is used now, something is required, and AFAIK all other captcha services can be OCRed and are therefore useless. End-users often like SolveMedia, but those seem really easy to OCR. I actually really like the image classification approach on a theoretical level, though I hate relying on NSA-lite Google, and occasionally on Tor they throw you into some insane black hole of difficulty (though you can change your Tor exit to fix that).
For me it is slow to load and sometimes asks two or three times ... Also it is quite boring... Instead of traffic signs and roads and cars it could be about telling if it is a character from Star Trek or Star Wars ... or if it is a men´s or a woman´s legs or ...
Seriously, it is slow, but I don´t know if there is anything out there that offers the same level of safety and is faster.