Mercurial

Mercurial is an SCM written in Python that has a number of interesting features.

Date	Link	Notes
2010
Mar 27	Hg Init	Possibly the best online tutorial available right now.
2009
Jun 15	Hg-Git mercurial plugin	A brilliant, pure Python implementation of git that lets you work on git repositories without installing git at all.
Feb 26	InDefero	A Google Code clone with git and Mercurial support. Regrettably, it is written in PHP, but should nevertheless be useful for internal deployments.
	Mercurial-easy	A very nice `curses` front-end
	CuteHg	An even nicer graphical front-end.
Older	Get ‘hg view’ to work in Mac OS X
	TextMate bundle
	tailor	a tool to migrate changesets across different SCMs
	TortoiseHg	a Windows Explorer extension (requires the Win32 Python install and PyGTK)

My .hgignore file:

syntax: glob
*.log
*.log.?
*.log.??
*.pyc
*.pyo
.*.swp
*~ 
.DS_Store
._*

Updating a local instance upon push/pull (used to publish this entire site):

$ cat space/.hg/hgrc 
[hooks]
changegroup = hg update