Installing SharePoint 2010 on machine with existing SQL Server 2008

If you already have SQL Server 2008 installed, DO NOT install SharePoint 2010 as a single server (standalone) version. It will create additional instance of SQL Server Express, which is obviously not what you want. This also brings some additional problems (based on this). Select a full installation. If you don't have domain and using local accounts - you need to read this blog.

SharePoint 2010 Beta Installation

Do not try installing SharePoint 2010 Beta (14.0.4536.1000) on top of SharePoint 2010 Technical Preview (14.0.4006.1010) unless you really need this.It will install but would not work correctly. Just uninstall previous version first.

Office 2010 x64 with Office 2003/2007 side by side

I am still using Office 2003 to be able to work with some legacy applications. While installing Beta Office 2010 x64 I got an error that I can't use 2003 and 2007 side by side with 2010 x64 - and I have to use x86 instead.

Just uninstall all 2003/2007 office apps, install 2010 x64 and than install office 2003/2007 without any problems.