I've been running http://www.weneedthenbn.com/ since Saturday night, and it's been getting a bit of traction, too.
My phone call to my local MP wasn't exactly promising - while I couldn't talk directly to the MP (although I didn't expect to), the person who answered seemed generally uninterested in anything that I had to say, and was unaware of the technical differences (other than "the LNP plan is cheaper").
I hope we can make a difference here, and there seems to be a lot of support for it. Even if 1% of the people who signed the petition called/emailed/wrote to their local member, we might have a chance of making a difference.