Good news :-)

Personally I use both Evernote and Simplenotes as appropriate. SnXM has one strong point over the N900 Evernote client : it can be used offline to create new notes or access those already synchronized.

Also, you can relax on the tags issue anyway, because the Simplenote API 2.0 was "published" just around the time I released SnXM 1.0 (typical, right ? :-). I'm studying it right now, but it's already clear there is nothing in it about tags, so apart from being "RESTful" as they say, it has nothing much over 1.0. I guess that will come later...