henry0 - 12:48 pm on May 4, 2012 (gmt 0)

At first glance:
To create an account login with Twitter.
Wait to be invited.
In the meanwhile Prismatic analyse your Twitter's follow/following.
Comes back to you with an invitation to join and:

We've learned about your interests from twitter, and we've got a personal newsfeed ready and waiting for you.

Visit what you got.
So far I like it, Prismatic founds topics that I am directly interesred in
and let's you tweet directly to the topic's owner, as such it could be used as some sort of filter.

Next: let's review it in depth, I'll be back with more....