ReadWriteWeb has a poll asking: "Are you using FriendFeed?" I am, so I’ve answered the poll.

The single biggest result is the 42% saying they’ve been using FriendFeed since before March, plus the 13% who’ve signed up "after all the hype this month (SXSW)."

Hardly a scientific result but indicates at least the bubble crowd rush to try something new.

Or does it have more substance than that?

If you’re like the 8% who answered RWW’s poll saying "Friend-what?", this is how FriendFeed describes its service:

FriendFeed enables you to keep up-to-date on the web pages, photos, videos and music that your friends and family are sharing. It offers a unique way to discover and discuss information among friends.

Clear? I see it as a tool that aggregates content from your friends, colleagues, etc, in one place, wherever that content originally comes from.

I’m using the word ‘content’ rather loosely to describe not only blog posts, Twitter posts, Flickr photos, etc, that your friends create themselves, but also things your friends are interested in. That might include their own delicious links, which YouTube videos they like, etc.

All of that gives you some additional dimensional insight into their characters and personalities that add to the overall perceptions you have about someone that you gain from other services you might use.

Plus, it introduces you to things your friends are interested in that you might not have thought about before.

One great thing I do like about FriendFeed is that I don’t have to keep visiting the website to get all this information. RSS centric as I am, I can subscribe to an RSS feed of everyone I’m connected to, which brings me links to the aggregated information in one place, in my case into FeedDemon on my desktop and synchronized with NewsGator Online on the web.

One less separate place to keep an eye on.

Now that is useful. Some substance there all right.