I have Poster Stack. But this is for a client. They would need to be able to login and update the blog themselves.
I always find these CMS things a bit of a minefield!
With regard to Rapid Search Pro. Will W gave me this info:
I need to figure out a way the client can blog. But the content show up in a search bar
RapidSearch Pro can only index pages that are listed in your sitemap.xml file. This file is normally generated by RW and added at the root of your website. It serves the purpose of listing all the pages for search engines to navigate to and index. So if these blog pages are not included in the sitemap, there would be no method for RapidSearch Pro to see them.
RapidSearch Pro does allow you to manually generate a sitemap and the SimpleSearch stack does something similar too. But ideally you would want to have unique links (permalinks) for each of the blog entries. Otherwise it probably will not work too well to have search results point to a single blog page of multiple articles (hard for people to see what they searched for).