During the course of the day-long event in each city, our various speakers demonstrated a number of Web 2.0 products and websites, some were IBM-produced, many were not.
Here's a quick rundown of some of the sites, etc., that we covered. (We've asked each of the speakers to help fill out this list!)
Web Links
IBM/Lotus Product Sites
www.lotus.com/connections
www.lotus.com/quickr
www.lotus.com/sametime
You can "play" with the above products at:
greenhouse.lotus.com/home/login.jsp
Other Relevant IBM Sites
www.ibm.com/developerworks
www.ibm.com/alphaworks
QEDWiki Home Page
services.alphaworks.ibm.com/qedwiki
Mashup Hub Home Page
services.alphaworks.ibm.com/mashuphub
Damia Home Page
services.alphaworks.ibm.com/damia
ManyEyes Home Page
services.alphaworks.ibm.com/manyeyes
Web 2.0 'Starter Kit' for DB2
www.alphaworks.ibm.com/tech/web2db2
IBM's main "Web 2.0" home page(s)
www.ibm.com/web20
www.ibm.com/developerworks/web
DeveloperWorks Open Source
www.ibm.com/developerworks/opensource
Open Source at IBM
www.ibm.com/linux/opensource
Bob Sutor's blog
www.ibm.com/developerworks/blogs/page/BobSutor
Kelvin Lawrence's blog
www.ibm.com/developerworks/blogs/page/KRL
Web 2.0 Definition from O'Reilly
www.oreillynet.com/pub/a/oreilly/tim/news/2005/09/30/what-is-web-20.html
Economic Sites
www.amazon.com
(reviews, ratings, recommendations, "also purchased ...")
maps.google.com
(mashup of maps and economic data)
www.housingmaps.com
(mashup of Google Maps and Craigslist apartment data)
Social Bookmarking Sites
del.icio.us 
ma.gnolia.com
www.stumbleupon.com
www.listible.com
www.trailfire.com
www.technorati.com
Social Networking Sites
www.myspace.com
www.facebook.com
www.linkedin.com
www.livejournal.com
www.flickr.com
(also serves as 'file/photo storing' example)
Technology Examples
Google 'Suggest' beta: www.google.com/webhp?complete=1&hl=en
Baby Name Wizard: www.babynamewizard.com/namevoyager/lnv0105.html
Many Eyes: services.alphaworks.ibm.com/ManyEyes/
Movies and more: www.liveplasma.com
Mashups and more Web 2.0 info: www.programmableweb.com
Data Mapper: www.dapper.net
Mashup of Digg, Slashdot and De.licio.us: doggdot.us
Online photo editing: www.picnik.com
Online office tools: www.zoho.com
Google Docs: docs.google.com
Blog/Wiki Examples
www.lotusgeek.com
www.edbrill.com
www.wikipedia.com
www.socialtext.net/web2wiki/index.cgi
www.engadget.com
www.techcrunch.com
www.jroller.com/cooney
www.digitalanalog.net/
Domino Blog/Wiki Templates
www.openntf.org
(both a blog and a wiki template there)
www.s3maphor3.org
Web 2.0 Resources for Domino
www.codestore.net
Web 3.0 'Examples'
www.pandora.com
(Internet radio that 'suggests' new music)
www.adaptiveblue.com
Podcasts
IBM's 2007 podcasts on the subject of Web 2.0:
Preview of "Web 2.0 goes to work"
http://www.ibm.com/developerworks/podcast/dwi/cm-int082807.html
IBM Business Mashup Challenge winners
http://www.ibm.com/developerworks/podcast/dwi/cm-int072407.html
Dave Newbold on what Web 2.0 means to the enterprise
http://www.ibm.com/developerworks/podcast/dwi/cm-int061907.html
A preview of Lotus Notes 8 with lead developers
http://www.ibm.com/developerworks/podcast/dwi/cm-int052207.html
Interview with Tim O'Reilly
http://www.ibm.com/developerworks/podcast/dwi/cm-int010907.html
Whitepapers and articles
Gartner: Social Sciences will be More Important Than IT to IT Departments
CIO Insight: Collaboration: Superhero in the Cubicle
IBM: Achieving Tangible Benefits with Social Computing
Videos and more
IBM Video - FAA and Connections
IBM Video - Deutsche Bank and Social Networking
David Barnes' Web 2.0 Videos Home Page
www.youtube.com/iboyibm 
And, finally .... that infamous "Web 2.0 ... The Machine is Us/ing Us" video from the University of Kansas: www.youtube.com/watch?v=6gmP4nk0EOE