TechVideoBlog has measured the HD qualities of the various video services now offering HD video sharing, and it looks like YouTube and Facebook are now the leaders. 
Here are the specs they measured, along with links to example videos:

Youtube HD: 1280×720 - 2mbit/s H264 - full framerate - 44hz stereo 254kbit/s AAC audio
Facebook HD: 1280×720 - [...]

It looks like everybody’s going HD.
Facebook has announced that it will now support HD video:
Since we launched video last year, more than 45 million videos have been uploaded to Facebook with approximately 100,000 new videos added each day. Starting today, you’ll be able to upload higher quality videos to Facebook and also embed your Facebook [...]

Apple has announced the top iPhone apps of 2008 (App Store link). 
Here are the top iPhone apps for social networking:
Top Paid Social Networking:

MobileChat
BeejiveIM
Quip
Rooms - Your Mobile Chat Client
Twitterrific Premium
Flutter
Twittelator Pro
mBoxMail
Secrets
hiCard - Suite

Top Free Social Networking:

Facebook
AIM
Myspace Mobile
IM+ Lite
Loopt
Fring
Palringo IM
Earthscape
Twitterrific
Avatar

Notably absent is Linked In.
Let me know what you think of the list!
via MobileCrunch

Wiggly Wigglers, a natural gardening mail-order company (which specializes in vermiculture: composting/gardening with earthworms) has won the 2008 Global Dell Small Business Excellence Award. Wiggly Wigglers were chosen to receive this prize for their innovative use of podcasting, wikis, and social media such as Facebook and Twitter.
Along with the recognition and accolades, the Dell Small [...]

StreetIQ.com has announced the launch of a Facebook application (registration required) that provides quick access to more than 400 business and financial podcast channels and integrates them into the social networking experience on Facebook.
Using the recently launched software platform at Facebook, StreetIQ.com lets Facebook members access their favorite business and financial podcasts and to share them [...]

FeedBurner has introduced Headline Animator, an application that displays the latest headlines from Feedburner users’ blogs, podcasts and RSS feeds for Facebook users worldwide.
Facebook is a social utility that offers a way for people to stay connected with their friends and the people around them. Facebook is the sixth-most trafficked website in the United States.
Headline [...]