These links have been helpful to me over the years, and I hope some of them can help you, too.  There are some great references in here, and I add more all the time, so check back frequently and let me know if you have any ideas for new links.

Blogroll

Business

Business-oriented topics.

Commercial

Equipment

HDR

Lighting

Lightroom

Links of Links

Non-profit

PhotoBlog

Photoshop

Printing

All manner of printed output, including canvas and other "non-standard" productions.

Retailers

Here are some retailers I've either used or promised to use as soon as I scrape up the cash to afford some of their stuff.

Software

Tutorials

Workflow