Bhima: Thanks for reporting the problem, I have fixed most of the issues with Digg's new design. Please let me know if there are still bugs.

yellowriver: I'm sorry but this script doesn't autobury comments. It only works with posts. I've been busy a while back writing the parts for autoburying comments but then Digg changed the design and I had to rewrite a lot of stuff and there were some real projects waiting for me so I never finished that part. I'll be back on it as soon as there is some free time.

Bhima, it's great that this script still works! I just fixed a small issue. Sorry for not updating in a long time because I've been busy with other things but I have your requests in my mind and will add them gradually.

This script is stolen from Jarett's original "Google Account Multi-Login" script located at: http://userscripts.org/scripts/show/16341

Shame on you ravish.

@Good To Too, I don't think running a Greasemonkey script on the same page you are visiting breaks any of Digg's terms of service. I mean, it's not like this is a 'crawler' or 'spider' or anything like that.
As for the useragent, check out the script source, it's not tampering the UA at all.

@Bhima, thanks for your observations! You can already bury stories based on their domain. For example if you want to bury all stories from stormfront.com, just put stormfront.com in your keywords_blacklist. It will bury all the stories from that domain. I am also working on an 'autobury comments' solution and hopefully I can add it to this script if possible.

@Bjalf, Unfortunately Greasemonkey can not read local text files, only Firefox extensions can do that. However, if you have your text file hosted on your own webserver, (say, http://localhost/autobury_prefs.txt), I can add an option to this script so it fetches the text file first. Is this what you want? Please Let me know, I can add this option easily.
Also as I replied to Bhima, you can already bury URLs, add them to your keywords_blacklist.

Bhima, do you still experience slowness with long blacklists?
I optimized the code for the second time and it feels a bit faster now.
You can also change the delay interval between the buries because burying more than 1 story at the same time didn't look very right. Please upgrade to the latest version!
Converting this to an extension will not speed it up too much. Only if you are going to bury comments then using a Firefox extension is better.

@HatastiX: that's a cool idea but will be very slow if it is done as a userscript. If I ever made it to a Firefox extension, I'll post a link here.

@Bhima: Can you please upgrade to the latest version (Feb 21) and check if it outputs any error in your Javascript Console? Unfortunately I have no access to an osx system to test it myself.

Armus: It cleans Google's random cookies like 'SID' and such. Check out the source of the script.