What do you think? On the one hand it doesn’t make a whole lot of difference, on the other hand, branding is important. I think “hub” has connotations of community and sharing in way that “host” does not. Also it’s slightly shorter. I’m thinking to use the camel case for TiddlyHub since it matches TiddlyWiki and GitHub, one of the better known “hubs”.
If I do change it there’ll be options to redirect, or maybe keep your old urls, so don’t worry about existing links and bookmarks.