Something I'd really like is a way to expose CSS styles to the editor easily. One of the major problems I always run into is that my customers try to make things look like the rest of the website by hacking the text a bit.
They'll see a highlighted word or sentence with a bold font, wider spacing and a blue background. So they set the background blue, the font bold and the spacing wider. But really, the editor should provide an intuitive way to apply the <span class="highlight"> element.
Some editors out there do this, but they generally suck in other areas. Wysihtml seems to apply inline CSS. Can it easily apply a class too?
I always want to donate to such causes, and always the only options are creditcard or paypal. I don't have a creditcard and I refuse to use paypal.
Last time Wikipedia asked for donations, they had a nice iDEAL (the online payment system in the Netherlands) option right there on the first page. I entered €50,- pressed a button and presto. Done.
Moral of the story: if you want donations, invest some time into making it super easy to get donations. I can't imagine there isn't some online service that'll let people pay in just about every possible payment method there is.
To say that a mathematician doesn't intuitively understand single-letter names would be like saying a programmer doesn't intuitively understand a keyboard.
Dijkstra was a computer scientist in times where being a computer scientist meant you were basically a mathematician with a specialty. Semaphores were first introduced by him in one of his early EWDs (EWD35, http://www.cs.utexas.edu/users/EWD/ewd00xx/EWD35.PDF). At the time of EWD35, his EWDs were non-official musings, written in Dutch, intended to be shared amongst interested colleagues and such. It's not like he was writing a scientific paper.
I don't think Torvalds really meant anything much by it. He's just trying to be funny.