Social bookmarking / who enables what

I did a little survey of news sites on the internet and which social bookmarking icons or links they provided on a new news article. I removed social bookmarking sites that appeared fewer than 3 times (Mr. Wong, Muti, Fark, Socializer - I forgot to remove Mixx - tables are really hard to change, so I left it). Note that all of these sites are in English.

News Site	Del	Dig	Fur	FB	red	SU	Mix	Y!	NV
NYtimes.com	x	x		x					x
bbcnews international	x	x		x	x	x
washingtonpost.com	x	x		x	x	x			x
ap.com
reuters.com	x	x		x			x	x	x
timeslondon, global edition	x	x						x
cnn.com	x	x		x	x	x
bloomberg.com
dw.com	x	x	x					x	x
msnbc.com
theonion.com		x			x	x
abcnews.com	x	x	x	x	x	x		x	x
radionetherlands
international herald tribune	x	x	x	x				x
independent online (South Africa)	x	x		x	x	x			x
Sports illustrated online				x
times of india
cnet news.com	x	x
guardian.co.uk	x	x		x	x	x		x	x
christian science monitor	x	x

Key: Del.icio.us [Del] Digg [Dig] Furl [Fur] Facebook [FB] reddit [red] StumbleUpon [SU] Mixx [Mix] Yahoo MyWeb [Y!] Newsvine [NV]