So I just got a Surface RT, and I was very excited to update it to 8.1 Preview, and then... the Microsoft site says the preview isn't available anymore? I really don't want to wait over a month for 8.1 to come out. Does anyone happen to have the MSU file that updates RT to 8.1 Preview? I've scoured the net and can't find it :/ It should look like Windows8-RT-KB2849636-arm-msu or something like that. Really pissed that they pulled it right before my Surface arrived.