Perhaps I should have structured my "sales pitch" a little differently, so I guess it's time to address some aspects of the game I haven't gone into before:
Who can play?
Ladies, Lieges, and Lords are all welcome and it makes no difference to me if player and character don't share the same gender and/or sex. Males playing as females and vice versa is not a problem.
Character gender and sex
I won't rule anything out, but the society in this setting will be dominated by Christian values and morals. A character who is openly bi, gay, or queer in some way may find him-/her-/hisself ostracized from normal society and is very likely to have some serious difficulties interacting with most people. That does not make playing such a character impossible, but it will present some real problems in the character's daily life. Also keep in mind that in many medieval societies having kids isn't a luxury, but a necessity to provide both helping hands and old-age security. A gay character may well be forced by necessity to have children, even if that isn't exactly their preference.
The role of women in this world will be slightly improved over some real-world precedents, e.g. when it comes to inheritance rights, but (in general) a woman may not wield the same power and influence as a man. Strong women can and do exist, but unless they are of a high social standing they may have to be subtle in how they interact with a male-dominated society.
Game level / category
Without any fantasy elements all characters will be human. While I have not completely made up my mind yet (and will take player input into account) I see this as going into either the Light or Non-Con category. On the other hand, not everything that could develop between characters has to be played out in the group threads. There is no reason why two (or more) people couldn't base a one-shot roleplay on characters and situations developed in the Kirborg game and post that in the appropriate board.
I'll bother about a character sheet and post header format if and when there is some interest in this game, but both will (most likely) be pretty "generic", covering character appearance, family and personal history, some personality traits, and so on. A few details may be required, but I won't ask for too much detail. If you want to go into small details and add information to your character sheets you will be free to do so, but I am someone who likes to discover details about his characters during gameplay, so if you are like me you are welcome to paint a picture of your character in broad strokes.
Number of character and players
I'd say this can be played with a minimum of 3 players - provided they are willing to post regularly, regularly meaning perhaps about four times a week or every other day. Maximum group size I would say should be about 6 players, depending a bit on how many characters everyone plays.
Multiple characters per player isn't a problem - and may actually be a good idea, depending on your character concept(s). Many a farmer or craftsman (or even knight) has his/her hands full just dealing with daily work in a medieval world. Playing both a knight and his squire, or perhaps a farmer, his son who is an apprentice to one of the village craftsmen, and his wife who serves in the Baron's household can open up new possibilities and roleplaying options. Playing multiple characters is by no means a requirement, but it is something perfectly fine in this game.