Joost Beta Application

[Joost]

Partial text of an eMail I just received:

Thank you for your application to join Joost's beta test program.

Once you've confirmed your address, we'll add you to the beta testers
waiting list right away - but *you won't be able to access the Joost
website and software until we've activated your application*. This may
take some time - we've had thousands of applications since Joost was
launched, and we're working as fast as we can to add more users. Please
be patient - and keep an eye on your inbox for your login and password
details.

Anything to escape the YouTube parade of LonelyGirl15 and Justin Timberlake video copy-cats and parodies, but:
a] will this run on (my) PowerBook?
b] do I have to watch all of SNL if I just want to see the Sassy's Sassiest Boys clip?