Oh wow... I know some of these artists and noticed this cafe had replaced Everest only the other day - I'll check it out if the exhibition is still on. Thanks.
Plurk is very similar to twitter though is more micro-forum than micro blogging. I also find plurk to be an extremely friendly web environment - something for which I have no ready explanation... it just seems to be a kinder space than similar services. However, I've never had success logging into the mobile site on my phone so only access it via the browser.