Stumble it! 
A very well informed person close to the Joost/Skype folks told me that apparently a senior Skype/Joost employee Niklas Zennström had to call up Fredrik de Wahl, CEO of Joost, from London to get his/her Joost account activated. Looks like I wasn’t not the only one who had problems signing up for a client. 
[Corrected: It wasn’t Niklas Zennström like what was mentioned earlier]
