>I am about to download and install SQL Server 2008 express on customer server. I found MS page that seems to be the right one ( http://www.microsoft.com/en-us/download/details.aspx?id=23650 ). But what makes me wonder if I am on the right page is that it says the date published is 04/20/2010. Didn't MS have a more recent version of SQL Server 2008 R2 (not 2012)?

You will need to install SP2 after that. Or better search for the version that already includes SP2.