Halo Warthog hits Sydney this week; Coolest Mum Ever builds 98-inch HD screen into kid's bedroom roof; Microsoft and Yahoo! become BFFs, but in Australia they're already in bed with bitter rivals -- this could get ugly; MiFi 3G router looks great -- can we have it down under please?; plus some thoughts on Symantec's Norton Internet Security 2010 and the HTC Hero.