I'm in Australia and I have this exact same problem. The only way I can view Scribbld pages is to copy the relevant links and send them to myself, and then just check the links on my phone (making sure its on 3G or whatever and NOT my wifi at home). That works fine, even though it's a huge pain in the ass.
Personally, I've just stopped joining games that host most of their source material on scribbld, even if I really love the concept. It's not worth the hassle. Definitely not the answer you were looking for - I wish I had one, believe me! - but you're not the only one having to find workarounds just to read lists and in some cases, to even access the current cast page.