Modules are many things and I'd have to agree that those that work are the best. However, you have not defined what you think is cool.

Are we speaking of cool GUI features? Are you speaking of adding stock quotes or weather to your feature set? Or are you thinking about audio and video sources?

I do think the Autonomic AppleTV module is very good. There are a number of modules for stocks and weather that are very good--some for free and others that are for sale.

I also think the Controlworks Squeezebox module very powerful.

However, the most valuable macros are those that let you code the jobs quicker with fewer data entry errors--and so let you get out of the job faster with more money in your pocket

Alan