I gave 2 talks on pop-up labs at the May VMUG meeting in London. This is the second one (but the talks were basically the same). How to create a pop-up lab in Windows Azure with demos of SharePoint and IIS pop-up labs using Powershell to automate the pop-up and pop-down operations.
If you want detailed instructions on how to build these labs, look at this post first and then this one. If you want the powershell scripts themselves – you can get them here.