A Few SPField Types
I have included a list of SPField Types below that I use and hopefully help others. My apologies as I don’t remember the locations to cite in gathering this information its been sitting in an excel spreadsheet and my terribly efficient use of metadata on a FileShare of only SharePoint stuff with 261,666 documents. The fields that have a Type other than “Invalid” can be created by using the Add Method of the SPFieldCollection Object and passing the Name, FieldType (SPFieldType) is Required
The following link provides types and members for working with sites and subsites or lists http://msdn.microsoft.com/en-us/library/ms464984(v=office.14).aspx
-Ivan