This is a quick post to capture some good resources for working with SharePoint Foundation 2010 and Search Server Express 2010.
Installation steps, prerequisites, etc. from Microsoft: http://technet.microsoft.com/en-us/library/ee808898.aspx
MSSharePointTips post about installing the two: http://mssharepointtips.com/tip.asp?id=1086
Search Server Express home: http://www.microsoft.com/enterprisesearch/searchserverexpress/en/us/technical-resources.aspx
and TechNet home: http://technet.microsoft.com/en-us/enterprisesearch/ee263912
Forum post regarding integrating SPF and SSE: http://social.technet.microsoft.com/Forums/en/sharepoint2010setup/thread/3294d73f-b127-439e-88af-c78c70f9a9e2