Some of the things he covered included:
It is Ajax that makes the movement in the Google maps so seamless. You don't have to wait for pages to refresh.
In explaining about mashups and APIs (application program interface), Gary give us the example of http://bookjetty.com/ where the catalog and amazon.com have mashed together to give users combined information. http://programmableweb.com has a big list of mashps and APIs.
A Microformat example called h-card looks very interesting! It is the 2.0 version of a business card.
This is diagram on mashups that he showed that really helped me to better understand what they are.
There is so much more to share. I will have to do one more post of a more reflective nature of all this good stuff. I really appreciated all their efforts today! Once again, Michelle Boule's and Gary Wan's 2.0 wiki is here.
P.S. I heard back from a couple of Librarians on the homefront when I sent the morning post...they were so glad I was learning and enjoying it so much...BUT...they couldn't see the info...because.......(drum roll please)....... it was blocked! ( sigh)