am already using prefixes for grouping tags - not pretty but it works. but i'd like "formal" tag-grouping just to be able to expand/collapse tag-groups in the tag sidebar, for neatness more than anything else

yes, images in notes is important IMO

maybe related to the planned feature on note formatting but here goes - allow forum-stype markup language( [img], [url], etc.) - believe this could address any linking you might want as well

local file links, together with capability to hold web links, is all I really need :)

Not too important to me as a feature, but making it optional is a great idea :)