Once you receive and accept one SoR for one account, that account can invite another account of yours and will receive the mount once the invited account pays for 30 days. You can chain that to get four of your five accounts the mounts if you want to, though I think there is a delay of a day or so between inviting and the invite showing up.

Three of us are working on Dragonsoul ATM (in fact, we three-manned Morchok 25 the other day) and are typically more interested in PvE, while Invisaheals is fifteen-boxing mostly PvP. Mokoi seems to like a mix of the two. I am on a business tri p for the next few days, but most of the people on can invite you to the guild.