a pastebin/pastepage with edit functionality?

[sybariten]

There is a brilliant pastebin page over at www.pastebin.ca, people use it to post code snippets and show each other when they need help for instance.
There are many pastebins, i like this one because it's pretty clean and also because you can get a "raw" version of the post, that contains nothing but text.

Normal paste example
http://pastebin.ca/641813
Raw paste example
http://pastebin.ca/raw/641813

Now, thats all good, but lets say that i want to add a signature to that quote above, i want to add "C. Dickens" at the end. I can always update the post at pastebin.ca, but i will get a new URL then.
The URLs you read in this forum post would be out of date.

Is there a similar web service where i can update the same post ,and keep the same URL?

I'm thinking in the same way as one edits a forum post. There is probably a way to link to just a single forum post with a URL, but there will still be lots of formatting, and there will still be a need to have an account.

I want to be able to make a quick post, give the URL to different people, and then change the content of the post without needing to inform all of my people that the URL has changed.....

[sybariten]

No suggestions?
A workaround-solution, albeit a cumbersone one, would be if there exists a URL-relaying service that can be updated easily.

Like this:
original URL to text is www.pastebin.ca/10345
A relay URL is created in the form of www.shorturl.com/ABCR ---> www.pastebin.ca/10345
The text at pastebin is edited, www.pastebin.ca/10345 ----> www.pastebin.ca/10357
The relay URL is updated www.shorturl.com/ABCR ---> www.pastebin.ca/10357