On the "Experience" site in Search Options you have the ability to search on words, tags, names and dates.
I would like to suggest you have an option to limiting your search to a specific area (i.e. blogs, forums, ideas, and updates).
Also it would be nice to be presented with a pull down option for tags that lists all tags currently in use in the site (or the specific area you are searching) - rather than having to look up and then manually type out the name of tags.
John Schneider
Forest Hill Church