Is there a way we can publicly follow the growth of the site? Moderators have access to some data, but aren't allowed to share it with the rest of the community. Are there public resources to this effect?
Sure you can! Quantcast is also tracking visits to the site directly. Get yer loot here:
I suggest you switch settings to Global and Range to All.
Here's a small, hopefully up to date chart of views last 365, 90 and 30 days.
...and here's an annotated graph as of November 10th 2011 and June 14th 2012 (due to Jeff's impatience):