SQL Server 2005 Service Broker

Today, I attended an MSDN webcast on SQL Service Broker in SQL 2005. Found it to be very interesting and saw a lot of scope for future development in that area. I am planning to investigate more into identifying practical scenarios for using this technology. I can see how distributed applications re-architected using SOA can use this technology to their benefit. But, I need to understand more on why we need to move messaging into the database instead of having it at the application level. I am sure there are pros and cons with both methods. I will try to write more about those when I get to read more on this topic. For now, I found this blog to be very useful in this regard -

http://blogs.msdn.com/rushidesai/

Also, check out this article on MSDN -
http://msdn.microsoft.com/library/en-us/dnsql90/html/sqlsvcbroker.asp?frame=true