The most recent version of Shape2Earth includes a functional prototype for converting shapefiles to a GeoRSS format. It currently works with simple lines and points. Attribute data can be selected to be embedded in the GeoRSS feed.
Select the attributes you wish to export to GeoRSS
Attributes can be embedded in the xml, listed as a table, or both
GeoRSS is a very popular format, and is particularly useful for serving data to web mapping applications such as Google Maps.