I am now done spamming you all. From here on out, if you see something that should be changed in the S2 (or any other) FAQs, or want to suggest a new FAQ, you can go back to the old process of posting a top-level entry to this community.
Thank you all for your patience over the past few days of massive and rapid FAQ change :)
177: jc, add usage instructions for a custom style in the bottom paragraph
7: tenshisama, included information on creating custom S2 styles and noted that not all system styles support title/subtitle
172: rahaeli, added links to custom style and custom layer FAQs.