SharePoint 2010 Beta is now available for download for MSDN and TechNet subscribers. There are a few snags in getting it to work for some people, though. This post is a list of resources for overcoming those snags:
SharePoint 2010 will install on 64-bit Windows 7, but you need to make some updates to the configuration file first. See this post for details:
Server 2008 R2
SharePoint 2010 Beta will not install correctly on Server 2008 R2 without this hotfix:
Note that as of the time this blog was written, the link was not yet active.
SQL Server 2005
In order for SharePoint 2010 Beta to install correctly on an instance of SQL Server 2005, you need SP3 with the following cumulative updates installed:
In order for SharePoint 2010 Beta to install correctly on an instance of SQL Server 2008, you need SP1 with the following cumulative updates installed:
Installing SharePoint on a Domain Controller
If you are installing SharePoint on a server that is also an Active Directory Domain Controller, you need to run a few PowerShell commands for Sandboxed solutions or Office Web Applications to work. See Jie Li's post here:
Installing SharePoint using Local Accounts
If you are installing SharePoint without Active Directory, using Local Accounts, you need to follow these instructions to get it to work:
Visual Studio 2010
I have heard of several instances where a Visual Studio 2010 installation caused problems with a SharePoint installation. I recommend uninstalling Visual Studio 2010 before trying to install SharePoint.