Good reading!

Check the articles from the good folks at www.lensrentals.com (you can access via their RSS feed at http://www.lensrentals.com/feed/news.xml). I've found their articles informative and interesting and cover a wide range of subjects.

Also, I'd highly recomment these guys if you are looking to rent some equipment. I've rented from them a few times, have recommended them to friends for other times and have nothing by good words regarding their service!  

Enjoy!