Nah. But seriously: nah.

That's not on "Linux"—which you seem to describe in monolithic terms and as if this monolithic community could magically sprout an appendage that does everything you want. There's already emulation. Some emulation software isn't terribly difficult to use. Most Linux users are still expected to read the documentation before expecting things to simply work.

Until Microsoft or Apple drop out of the desktop market, there will be no substantial incentive to make it any easier to run software built for those operating systems in a foreign operating system.

Careful with that (or cite your sources): as much as I love handwriting, from scrawl to cursive to calligraphy, much of the purported benefits of learning cursive instead of other modes of handwriting are rooted in mid-nineteenth century pseudoscientific marketing propaganda and is about as reasonable as the contemporaneous belief that alternating current is more dangerous than direct current because it kills elephants.

Now Italic handwriting, on the other hand... ;-)

I'd be okay with your proposal if, in addition, the lawyers were as invisible, silent, and afraid of water, as Nazgûl.

...but if they went the other way, it would be AFLAC, which would probably land them in court for trademark infringement.

No way would St. Ignucious show his support that way. You'd have to open source the original by way of sacrifice.

We do it in the road. I mean, really, no one will be watching us.

I do this every month. I don't call it a 'give-away'. I call it 'rent'.

Yeah, my ex-girlfriend told me that in *her* house, the ditch is one way... You must have known her too.

Given that it's something that is designed to be installed on any domain at all, it may not be required to be called Diaspora. I don't know many people who refer to their gchat account as jabber.

Not quite right. The square of the number of nodes takes into account all possible subgroups among those nodes. Reed's Law takes this number and removes singletons as well as the empty subgroup. You link to Metcalfe's Law, which does only deal with pairwise groupings and follows a pattern of triangular numbers (i.e., for five people there are ten possible pairings). Someone who is more adept with the mathematics than me should be in charge of actually saying which of these is more suitable for representing the value of social media websites, but it seems that Reed's Law is what you're looking for.

It already is.

Emacs?

The learning curve for Lilypond is really no worse than for any other text-based music typesetting software -- and far easier than, say, the TeX music packages. ABC is a little more simple on the surface, but is so much less flexible as to make it useless for complicated music. MusicXML seems to be a good transport format, but as parent points out, it's clunky: like any other XML format, everything is perfectly readable and will take a year and a day to type.

Lilypond, which seems to me to be the best option for open-source notation software, is probably not a worthwhile system for creating on-the-fly snippets for web pages. Something JavaScript based would be nice for that, and it seems likely that there could be wiki plugins that could be used to create musical examples without huge dependencies (much less specific versions of any given large software packages), or a knowledge of how to use these large, complicated notation software packages. There might still be the problem of being limited to simple examples, but do we really need all of Lilypond and its dependencies to create an example of a Phrygian scale?