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).
Let me stress what Theymos posted here for TOR users. I am here exclusively via TOR and have experienced the "black hole" he mentioned above. For some reason the change circuit feature on the TOR bundle fixes it. Nobody likes to stop and answer Captcha's, but if it keeps us from getting pounded on the server front end so be it! Once I go through the 30 second process to get in it runs slick for me. Good job!
About Tor... the DDOS attacks are brutal specially on Tor users. I wasn't able to browse the site today with Tor at the office, so I had to wait to arrive home and try with a normal IP, it was still slow, but Tor becomes unusable and today there was a heavy attack going, I got "busy, (504) and (502)" messages.
Now it's pretty decent again. And btw Tor got updated today and the noScript button is back so turning javascript on and off is now easier.