What about holding a reunion and inviting everyone who has ever been a member of WoV to attend. Now that EQ is free, that would not be a problem for most people. You could make it for a whole weekend to give everyone a chance.
Get volunteers to help with the planning of the details and the promotion (or two separate teams). Offer games, prizes, feasting (get some of the trade skillers to make armor, food, drink, etc.) Make it an all-out first WoV reunion and a BIG DEAL. Email some members if you know they don't come to the forum much.
Get as many people you can to help, since it won't be as effective if one person does it all, and we don't want you to do all the work and burn yourself out. I'll volunteer to write some of the promotion (I'm not much good at the legwork, but I feel comfortable doing the marketing writing or at least some of it).
You could also have teams of people visiting other forums to let people know - not necessarily guild forums, although Heroes would be a good one
- but EQ general forums, etc. For instance, WTF Comics would be a good one to advertise since it has tons of past EQ players in it. I'm a member of that forum and could insert a blurb with the reunion details in it. And so on.
Anyhow, it's one idea.