Today, Research in Motion is hosting a web based conference called "The Blackberry Technical Seminar 2007".
I have spoken with several insiders there and there is no release date for the Blackberry Application Suite (the suite was announced back in April 2007, bringing a virtual Blackberry environment for Windows Mobile 6 handhelds).
My take on it is that it will be released around the same time frame with Blackberry Enterprise Server 4.1.5, code named