Increase OS disk size

Is there a way increase the OS disk size (127gb) of an existing/new Virtual Machine from PowerShell or some supported Azure tools? I've seen the 2 links below, but was wondering if there was another way of doing it.

http://social.msdn.microsoft.com/Forums/windowsazure/en-US/122dffc9-158d-47d7-b928-d9be8a2bc902/providing-larger-vm-os-disk-sizes-local-to-azure-without-need-to-csupload-vhd?forum=WAVirtualMachinesforWindows

http://blog.maartenballiauw.be/post/2013/01/07/Tales-from-the-trenches-resizing-a-Windows-Azure-virtual-disk-the-smooth-way.aspx