Thanks for the feedback. Others have mentioned similar items.
1) Currently you can change the names of the fields as they are displayed. The current implementation is alphanumeric sorting so you could rename your fields somewhat or add a numeric 1. 2. etc in front (yes this is slightly odd looking) as a workaround. This is on the future wishlist.
2) As of MGE 2009 you can add calculated fields to some of the feature source definitions in your data connection for display in the properties pane and other API calls. The UI for doing Joins and Calculated fields is at the bottom of the editor.
3) The properties pane is html. You may be able to embed your hyperlink in an html anchor string
http://mt.gov in single quotes and the link is enabled in the properties pane. However this precludes the other properties. You may be able to concatenate them together in the display order you wish. I'm not sure.
Regards,
Dave