I'm a new user at the up-and-coming social media site Mixx.  I've been there a week, and so far, I like it.

Here are some initial observations and thoughts (from a social news novice):

1. Mixx power users are deeply engaged.

That's fantastic!  It's this core group of users who will be giving management valuable feedback, welcoming new users (like me), and making Mixx a generally nice place to hangout.

2. There's nobody on Mixx.

I've heard that Mixx currently has about 2.5m page views a month.  That's not bad, but it's nowhere near the traffic of the big 4 (Digg, reddit, StumbleUpon, Propeller).  But it's growing quickly, and converting new users and evangelists on a daily basis.

I can think of three effects this (current) lack of traffic has:

1. It has been largely ignored by web power users (SEOs, SMOs, bloggers, etc).  Mixx just doesn't have a large enough user base at the moment to push any significant traffic to the submitted articles.  So bloggers keep writing for and targeting the big 4 in their social media marketing strategies.
2. There isn't much spam (for now).  No reason for spammers to hit up Mixx in force since it's not pushing any traffic back.
3. Many great articles/links don't get submitted.  I'm surprised at how often I'm the first one to submit an article to Mixx, even thought that article has been hot on reddit or Digg for several hours.

3. You still have a chance to be top 5 user on Mixx.

Mixx's unique strategy of allowing users to create new tags/categories, and then only watch those categories (or "Add to their Mixx" in Mixx jargon), is brilliant.  It effectively allows the community to create mini-Diggs.