Are we getting discovered?
Unfortunately, none of us have access to the site analytics yet so we don't have hard data. However, based on activity on the site, I'd say we are being discovered. I'm not sure where the traffic is coming from, but some of the off topic questions are probably from users being referred here incorrectly. Users that arrive with good questions (or answers) are sticking around for a while, which is good.
Are we answering fully/appropriately?
For the vast majority of questions with answers, I say yes.
There have been some amazing answers recently (this entire thread is great). Not all are that high quality, but overall I'm happy with most.
I do get frustrated when I see ones that simply Google searched for the user, though. Ones that provide recommendations "according to reviews" and with little more than that are not what we are here for. That's not a high quality recommendation. Unfortunately, I'm been seeing more of these.
How satisfied are our users, both old and new?
I've shared my frustrations with the community before. The good questions generally get good recommendations. Unfortunately, scattered in those good questions, we see many technical support questions and a lot of "I want a new thing" questions with no details.
Is there sufficient moderation?
No, but not at the moderator level.
We have been in beta for 239 days (according to Area 51). We have 2 users with 2000 rep and 0 users with 3000 rep. We seem to be voting less often (both positively and negatively). Remember, reputation and user involvement is what drives Stack Exchange.
How are our various stats doing?
We can all see what Area 51 says:
- 3.4 questions a day (needs work, especially if we are closing a decent chunk of those as off topic)
- 68% answered (low, but not fatal)
- 99 avid users (users about 150 rep)
- 1.6 answer ratio. This has been dropping in recent weeks. I'm not sure if it's because users are happy once an answer is posted or if they don't have other suggestions, but competing answers are not a bad thing.
- 315 visits per day. This has been increasing.
Some other stats that I've noticed:
- Out of 787 questions on the site right now, only 273 of those have an accepted answer.
I mentioned above that we've been voting less. The data backs this up. Let's work on improving how we vote - both positive and negative votes are important.

The number of active users we have seems to fluctuate between 40 and 50 users a week. There was a clear spike around November (hello Black Friday and Christmas shoppers!).

The above tables and queries were taken from a query written by Code Review user rolfl (I believe he was a moderator at the time) which shows additional information.
What do we still need to work on?
Voting and user moderation. We want a high quality site. That means we need to be involved as much as we can.
We also need to work on our off topic questions. There are a lot of them. Previous discussions haven't seemed to help much. Unfortunately, I haven't come up with any further suggestions either.
What are the biggest issues we face?
Quality. We have plenty of high quality (and very high quality) content. That needs to continue and the low quality stuff needs to be eliminated, downvoted, and discouraged.