Apple (delaying Apple TV firmware “one to two weeks”). Microsoft (delaying SQL Server 2008 roughly five months).
Don’t be sneaky; be up-front. Respect your customers. Microsoft especially; with Vista tanking and bad PR abound from trying to buy out the OOXML format votes earlier, can you really afford to shit in your smartest customers’ hands and call it a sundae?
“This is going to take a bit longer, because we want to make really sure we’ll get this stable and working.” See how easy that was?