Your comments

Sorry, I do not :( I think google might be your best bet in this case.
It doesn't look like your sending the cookie. You're just making the call to /signin and then making another call to /account/images. The two calls don't know about each other at all. You need to save the session info returned from /signin and send it with your upload.
It sounds like the Cookie auth is what you need. How come it's not working for you? Could you send some code over to me so I can take a look?
Yes, I have actually, and it was specifically done for people with large amounts of images. More optimizations are coming soon too. I'm always researching new ways to make the site faster.
This is a little hard right now because nothing seems to be able to detect the mime type, since it's so new. I'll see what I can do though.
It sounds like you're confusing the gallery section (http://imgur.com/gallery) with random images from Reddit. Only the gallery has comments.
Yes, it should. It's a DNS problem for sure.
It sounds like your computer is having a hard time resolving the i.imgur.com domain. You might want to try changing your DNS settings to use either Google's Public DNS, or Open DNS. More information on that can be found here: http://code.google.com/speed/public-dns/
We were having some issues early this morning and saving the captions took longer than usual. However, they were indeed being saved and should have been visible a few minutes after you posted them.

Let me know if you have any more questions; I'd be happy to help.
The site is under really heavy load right now. If you refresh a few times then the image will appear as normal.

Usually, what happens is that your file is uploaded and inserted into the database, then you're redirected to the final page. Since it's under really heavy load right now, the database isn't responding fast enough and isn't inserted by the time you are redirected. Refreshing will fix it for now.