The rules relating to sigpics are quite minimal:
Posters may choose to send us an image to appear with their nick, and text or HTML may be included to appear automatically with this signature picture ("sigpic") or instead of a picture. No photograph of a person may be used as a sigpic, unless the photo is of the poster him- or herself — and this is highly discouraged as it is dangerous to anonymity. Please e-mail your request to firstname.lastname@example.org and include your nick and password. You will be notified as soon as it is ready for use, which may take several days.
Of course, the other rules apply, like no erotica, prohibited material, etc.
Rule #3 relates to profanity, but this has been mostly tolerated and primarily we want to see such language omitted from the subject line of posts. In particular, if this language is not directed at someone, it can be tolerated.
A link can be sent as memo to Lysithea in GCC.
Caretaker would have any current information regarding plans for the search function.