You can download the presentation I delivered at TechEd 2008 here.
Here are a couple slides from the presentation to remind you what the key features are in Microsoft Search Server 2008 (Express) and a reminder that these features will be available to Office SharePoint Sever 2007 as a "rollup" by early July and will be publicly available on the Microsoft Download Center. We'll post an announcement on the SharePoint Team Blog on its availability.
One of the sites I showed during my presentation was idvsolutions Search Server Demo at http://esearch.idvsolutions.com/default.aspx. It' a really cool demo that highlights the power and simplicity of the new federation features.
Another tip: if you're interested in SharePoint Search, you definitely need to subscribe to http://blogs.msdn.com/enterprisesearch.