Today at the Microsoft PDC 2008 Ray Ozzie announced Windows Azure, formally know as Cloud Services. Windows Azure is now available as a CTP (Community Technology Preview) just go to www.azure.com to download the SDKs and signup for an Windows Azure account.
Windows Azure will include what was previously called BizTalk Labs / BizTalk Services which in Azure is called .Net Services.Please go to www.azure.com and signup for the CTP and make sure that you give Microsoft your feedback on Windows Azure.