I emailed whiteline regarding their swaybars and they said its still in early development, they're planning to release it early 2010.
as for the invidia catback + HFCs
http://www.youtube.com/watch?v=QOlMkWvUWGI
it sounds nice just by itself on their prototype vids, but when combined w berk hfc's it sounds quite different - and a fair bit more rasp?
edit: my bad, the vid's of the old design - the new one sounds awesome !