Baratta Design has a Rocket Themes Developer Membership that is renewed yearly.
(Updated and paid for 2010 to 2011)

Rocket Themes produces high quality template's for Joomla at the rate of one per month. You can have your pick of the latest and most up-to-date technology available in a template. They also make special components that work within their templates. 

I can legally provide you with a template from Rocketthemes or JoomlaXTC complete with commercial extensions as part of a website design and or development project for you. I am not selling template's and you can not buy one from me. Your licensed template does not expire.

• Work with design templates
• Manage your entire website
• Make updates anytime, anywhere
• Save time and money
• Easy and powerful editing
• Complete Content Management
• Custom Extentions, Components, Modules and Plugins
• Connect with Twitter or Facebook
• Advanced Social Bookmarking features (Third-party normally)

• JoomlaXTC is latest template membership that I have invested in but they currently appear to have an issue getting their templates out on time. (As of January 31-2010 they are 3 template or three months behind, which would be somewhat acceptible if they were talking to their customers but they have decided to not to talk)
• They also appear to have a few issues with the function of some templates. I will have spend more time testing and investigating their products. No doubt they look good but it will take more than pretty graphics before I start introducing my clients to their work!

Baratta Design has joined several different template club's over the last 4 years. I currently belong to a couple of sites and always keep an eye on any new or current template designer's work. Template's for Joomla as of December 2009 are taking a new direction, at least new from Rocketthemes. The 'Grid' type technology has been around for a while. Sounds like there are several different brands that work. I am just getting into it now, December 2009.