I made a comment here with the same idea:
https://news.ycombinator.com/item?id=25300423
I love the idea that I have a place to publish random stuff that I don't have to spend lots of time writing, I can just drop a sentence and maybe someone else will find it useful.
The big problem is that Google will basically never give you that page in a result, no matter how relevant it may be to your query, because it prefers SEO-rich content farms like Wikihow. I was thinking that a service would at least be easier to search/remember to go to.
This allows you to throw extra features in the HTML like searching for files and randomly selecting a note for viewing at your leisure.