Here are some links I have found useful or interesting:

Photography Sites:

www.liquidsculpture.com - Martin Waugh's the world expert on photographing water drops...

www.biwainc.com - a New York Studio, Japanese photographer, wonderful staff and liquids....

Gear Sites:

Review Sites:

www.dpreview.com

Software Sites:

www.softwarecinema.com

Organizations of Interest:

High Speed Flash Sites:

www.hiviz.com

How To Sites:

Electronics Sites:

Blogs: