Thanks Tony, I'm not very familiar with the other vector based products but do of course know of their existence. I've actually just tried exporting as Adobe Illustrator 4.0 but It doesn't seem to preserve the blends between objects. This isn't a major problem of course - it just means a bit more work for the end user to get it looking OK (as long as they can read AI files in the first place that is).

beaker
12 gig blue/magenta/orange/yellow (at the moment :-))