1/ Could we possibly adjust What are LiveJournal's limitations on data? to include something about the earliest date you can post/backdate something, and the latest date you can post/backdate something? (1970-01-01 and 2038-01-19, iirc).
2/ Could we possibly add a FAQ about the new "kill all sessions" option on logout? timwi, I know, is great at explaining this (for example). I've seen several requests regarding this and I think it would be a beneficial FAQ to add.
3/ Could we add something to How do I buy a paid account for someone else? about the /paidaccounts/friends.bml function?