Enhancement idea: Most CMS include short author bios and portrait images on these kind of pages. Maybe duplicate whats available in TAG_PAGES_DESCRIPTIONS as AUTHOR_PAGES_BIOS with the same format? and then the same for AUTHOR_PORTRAITS, I believe would work well.
“Guest authors” usually want a link back to their homepage from these kind of pages too … AUTHOR_HOMEPAGES? Or just make AUTHOR_PAGES_BIOS accept HTML blobs (TAG_PAGE_DESCRIPTIONS are just one paragraph of text).
…s more than one author