Well, it's a rim. If you wear eye glasses, you have your regular "I need these to see things" lenses mounted into your fancy-ass $1500 rim. You'd need them to see the damn movie, even if you weren't recording.
I've had git hooks do this for me for years. I have my hook check for pushes to a branch called "production", export the code (git archive | tar), run some unit tests, and then do whatever it takes to get the code to its destination and restart what needs to be restarted.
Git supports cloning over http, ssh, local file path. You can also create patch sets with `git diff` and share them however you want, obviously including email.
You can also mess with what you merge and what not via `git rebase -i` and `git cherry-pick`.
I don't see anything where darcs would be superior to git. It's just a matter of taste. Nothing to see here.
As far as I can tell, there's no purpose behind the hashing, besides block generation. Miners maintain the shared ledger by forging blocks which contain transactions.
Org mode... The only reason I keep coming back to emacs, despite my love of Vim. I've tried the vim "alternatives", and they just don't go anywhere close to good old org mode.
The one thing that I'd really like to see, is a properly made, polished mobile companion app.