Since mid-December, 2010, here are the rules for "when do I get a signature?"
In order to have a signature, you must:
- Have made posts that span a full seven (7) days.
- Have seven (7) published posts that clear or are validated in our anti-spam tool.
That's it. If you have 10 published posts and have made one post at least seven days after your first post, you should be able to create a signature. If you cannot, please send iacas a Private Message (PM).
You also get to write product reviews at the same time.
Edit: 2015-02-18 - Changed 10 posts to 7 posts.