The term “mash up” has emerged in recent year. It means using various data from differing sources. Sort of like showing a google map of the locations of those tweeting you. The map comes from google, the tweeets come from twitter and when you put them together it’s a mash up.
So, in that light I wanted to list sources of data/functionality that you can pull into your blog to mash up what you offer your readers.
http://YouTube.com
http://mediaplayer.yahoo.com/
Google Maps
Twitter
Facebook
MySpace

I've
been developing web sites for over 12 years. I started with HTML, moved on
to Perl and now do mostly PHP with a lot of MySQL and Javascript as well.