Jetpacked are new to Joomla and as such are offering the first them for free although saying that I'm not sure they'll ever charge.
The theme they are offering up is a port of the Wordpress theme they are currently using on their site, so it you like the look if it you can now download it for free.
I must say, like I've said a lot of times before, that the guys that give away the free themes really are a credit to the open source community. When you visit the site and start the download just say 'thank you' when you click save.
I for one will be downloading it, saving it, making a few changes and maybe putting it somewhere.
It's a nice simple theme, quick loading and by the looks of things will be very popular. Click here for more information or to download.