Here are some topics to start with for blogging:

You should follow the Blogging Guidelines

What is social media:

http://webtrends.about.com/od/web20/a/social-media.htm

http://www.slideshare.net/leewhite/social-media-is

http://communication.howstuffworks.com/how-social-networks-work.htm

Software

flash

web browser

operating systems

Mesh computing

networked computing

Hardware:

http://electronics.howstuffworks.com/cell-phone.htm

http://news.cnet.com/what-is-a-netbook-computer/

3g Cell Phones

Fiber optic communications

Cable modem

wireless LAN

cellular modem

Important online systems:

http://www.flickr.com/tour/

http://en.wikipedia.org/wiki/YouTube

wiki

twitter

Facebook

digg

del.ico.us

blogger

open source software

file sharing

mediawiki - http://www.mediawiki.org/wiki/MediaWiki

Search systems

Bing

Google

Yahoo

Ask

How Stuff Works

Design resources

w3 schools

Notable people

http://www.w3.org/People/Berners-Lee/Longer.html

Mark Andreesen

http://www.google.com/search?q=Joel+Tenenbaum

Google tips

how to search

http://www.google.com/trends/hottrends