just stumbled across this the other day,havent tried it yet myself
but the programs that is bundled looks interesting
i just tried to see if i could use this,but i couldnt even get it started from the live-cd,so i just keep linux mint 6,as thats one of the best linux distributions i have tried 
after searching the inter-web for pure-dyne i also saw one some forums,that puredyne could mess up your whole system.