The search continues for an app that might support the Sjogren's World Forums, but so far no luck. I think there are two problems. One, the forum app needs to support the format/language of the host server, in this case it's the SimpleMachines Forum. I am not yet aware of any app that supports them. Second, the site usually needs to be registered with the app's creators in order for it to be found by the phone when it tries to connect.
Right now I am going to check out mobile Firefox and Chrome as they are supposed to have a web forum extension, but we'll see