Any chance of doing a one-time-only NPC job on either Jonathon or LordWyrm's character to keep the story moving?
I hate to say it, but I had a player play with me for 4 weeks and then suddenly just quit playing without saying goodbye or anything. I think some people just like making characters but when it comes to PbP RP they don't keep coming back for the long haul.
Now, I'm not saying this is what happened with Jemal or Lord Wyrm - after all Jemal said he wouldn't be on much until November ... but to me I think you would be in your rights as a DM to NPC him if he hasn't posted in a day or two (since you said this was a post per day kinda game). And by NPC I don't mean do anything other than get them to say whatever is preventing the other characters who are online from moving on and joining other active players ... maybe?
I'm not trying to tell anyone what to do, of course ... I just don't want the players who are around to get frustrated and give up when a little harmless NPC job could get the game going again. But ultimately, as in all the games I play in, I live by the DM. If the DM wants to wait we wait. If the DM thinks he's given fair amount of time and NPC's a few characters that's cool too.
Or even just give Sye someone who interrupts her conversation with Lord Wyrms's character would mean avoiding NPCing the character. After all, her initial inquiry wasn't to anyone specific, Lord Wyrm just jumped on it then left Sye dangling there....
Well, anyway. I stand by the DM. Just trying to help get the game back to some kind of regular flow, that's all.