For our new citizens of hell... we have a side story going that's a little bit ahead of the main story line. Through the Looking Glass is sort of Hizkiel and Cassiel's first introduction into the story. It really does start at the beginning of the story and key elements are still in that particular time frame (Gabriel is out of grace, Michael is still pissy with Gabe, Hizkiel is still the temporary ruling Prince of First Heaven). Hizkiel and Cassiel are bored, on earth (in a location never mentioned just some northern city that's never named), and are about to make some trouble beating up some demons that are in a rave intending to cause some trouble with the humans. This is a perfect entery point for demon characters and possibly some fallen angels.
Also, we are about to enter a very open storyline regarding the angels taking over hell. (No link yet, we haven't started it yet). The archangels/Princes of Heaven are putting out the call to any angel in heaven that can... to come to hell and help them rule. This is a good starting point for any new angels because they will have to come in and properly request to lend their aid, putting them in contact with the main characters. However, this is to be the main storyline, so please let us know if you'd like to enter, same for any fallen angels/demons.
As for hell itself, anyone to be playing a fallen angel or demon will also have an easy time entering the story here. Only Satan, Lucifer, Valefar, and Azazel will be out of hell while the angels rule. All other fallen angels and demons are not being exiled. So it is a good place for those type of characters to join in. No demon/fallen angel will have to request to lend aid, just jump in where ever it suits them. At their home, around the palace, anyplace in hell, even earth if you can work it in.
Humans can also be easily intergrated in this story because we'll have some major characters up on earth as human, being punished, and our angels roaming around periodically as well as the ability to bring in the human characters. We'll be putting the fallen angels in the same town our human characters reside in.
As for human characters, currently it's a bit more difficult. We do have an unfinished storyline going on Return to Innocence where our angels were sent to earth as human to experience the human condition. Currently we are working on part two of that story. Part one is closed because we didn't want it to go any longer, the page length was getting long. Read it through though. Basically, the angels are teenagers going to high school. We can fit in adult characters if need be, but this is primarily centered around high school. This is also the thread where we test out any new members if they want to play a role we aren't ready to give to someone who we need to see how they handle characters and writing style before we handle over a fairly important character. So if you want to play a fairly major character, you will probably be asked to create a minor human character in high school to play here for a bit.
Lastly, always a good way to go if you want to start writing is to create a new thread for your character's introduction. The only restrictions is that it's somewhere within our storyline. Currently our storyline is about autumn of 2006. It starts with Gabriel (and Uzziel) not being a member of heaven's host at the moment, but not fallen (Out of Grace). Fairly quickly though he gets back into heaven. I'm estimating (though we haven't counted lately) that maybe only about two weeks have passed in story since we started. Of course with Return to Innocence not finished it will be a little longer than that probably, though that story hasn't even hit the 24 hours story time yet. We're still on thier first day on earth as human.
So if you start your own thread to introduce your character, start it about mid autumn-ish, leave it open enough for us to bring in some of the established characters, and let us know where in the timeline you are.