It's an excellent resource for unified communications, and he's got a great roster of contributors, including Blair Pleasant and Don Van Doren. There's a lot of content there, and it's updated regularly. You have to register to access the content, but it's free, and just takes a couple of minutes.
The website is serviceable, and with a few clicks it's not hard to find what you're looking for. However, Jim has been updating me on the overhaul coming for the website, so look for a new and improved UC Strategies portal very soon.
Technorati tags: Jim Burton, Jon Arnold, Unified Communications