okay - so I'm going out on a limb here - but I believe that using a 'toon shader' can give that outline effect - it might be worth talking to Tom Boothby, because he's got that line-art effect happening in his world.
I'll check that out, thanks Phil. :)
This is looking really good Heidi - the texture on the blue flowers (level 2 I think) the purple to the blue is quite a jump unlike the other levels - and just echoing what Phil has said I know that Ayunie has definitely used a toon shader too :) but its looking great :D
Thanks Scott. :) yeah I see what you mean about those colours however I think it might be blogger as the texture I used is actually blue which is quite strange. But I'll check it out nonetheless. :)