rosabella is actually pretty bloody good
i was annoyed at her 'publicity seeking' but checked her out. i think if you like clever lyrics and intelligent music, as most coldplay fans (like myself) do, then you will probably like her stuff.
if you read her witty blog you will see she is very tongue in cheek about the whole thing. (and possibly a bit embarassed).
looking at her myspace i don't think she needs cheap publicity. she seems to have alot of influential people on board and alot of talent.
(ironically i spotted her in the movie 'the goodnight' directed by chris martin's brother in law!!!)