Not every upgrade is a straightforward upgrade from one version of a product to the next. In order to help, we've got new TechNet library articles about how to perform an upgrade when you need to:

• Skip a version:
  • Upgrade from SharePoint Portal Server 2003 to SharePoint Server 2010
  • Upgrade from Windows SharePoint Services 2.0 to SharePoint Foundation 2010
• Get more features:
  • Upgrade from SharePoint Foundation 2010 to SharePoint Server 2010
  • Upgrade from SharePoint Server 2010 Standard to SharePoint Server 2010 Enterprise
• Upgrade from a trial version

A frequently-asked question on the TechNet Forums is whether you can upgrade from Windows SharePoint Services 3.0 to SharePoint Server 2010. Yes, you can, and you can use a database attach approach to do so. This process is so straightforward, we didn’t need a whole article for it. Just follow the process for a database attach upgrade and attach your Windows SharePoint Services content databases to your SharePoint Server 2010 farm.

Another quick cross-product upgrade is from Office Forms Server 2007 to SharePoint Server 2010. Again, just do a database attach upgrade, being sure to transfer your form templates over. Everything you need to know is in the database attach upgrade content, and the article Plan to upgrade form templates during an upgrade to SharePoint Server 2010.

Resources:

• Upgrade from other versions or other products – contains most of the articles mentioned above; also see Upgrade from Windows SharePoint Services 2.0 to SharePoint Foundation 2010.
• Determine upgrade approach – lists options and paths for cross-product upgrades.
• Perform a database attach upgrade to SharePoint Server 2010 – has all the steps you need to upgrade from Windows SharePoint Services 3.0 or Office Forms Server 2007 to SharePoint Server 2010.

As always, let us know if you have any comments or questions!

Samantha Robertson, Senior Writer, SharePoint Products (I’m all about the upgrade)