Web 2.0 Comparisons

Please help us to compare the pros and cons of the following Web 2.0 tools.  We've listed general categories for Web 2.0 tool types.  Please choose one and give your opinion of various tools that you've used. 

Here is the link to our comparison :  http://sheet.zoho.com/publish.do?docurl=oNg955zQJSMOqByvHeDRjw%3D%3D&name=Ipe%2FbIiXy%2FE%3D">

Podcasting

Here is the link to my podcast on podcasting:

http://cindygreen.podOmatic.com/entry/2007-08-08T13_01_52-07_00

Podomatic

Podium

MyPodCast

Tool Factory

Thefreesoundproject

Profcast

Audicity

Collaborative documents

Google docs

Zoho suite

Wikis

 For a comparison of wikis, see http://allthewikis.com/compare/table.htm

Wikispaces

PBwiki

Social Networking

For a comparison chart of social bookmarking tools, see http://www.roxomatic.de/1050

 Flickr!

Del.icio.us

Eportfolios

LibraryThing

Blogging

For a comparison of blogging software see http://axymptomatic.net/blogbreakdown.htm

Another is http://www.ojr.org/ojr/images/blog_software_comparison.cfm

 Blogger.com

Blogspot.com

 Buzz.blogger.com

RSS

 Bloglines

Feedreader

Feedburner

Sharpreader

VoIP

 Skype

Webconferencing

 Vroom

Elluminate

Virtual Worlds

Second Life

Croquet

Active Worlds