There is so much to illustration, and it's almost hard to say what is good and what is bad. Personally, I think I can tell what is a bad illustration, something that doesn't look like it has much effort to it, or any unique quality to it. I don't like Microsoft clip art at all, it lacks.... beauty.
Illustration is also applied to packaging to create a unique peice. The whole line detail, hand made type gives an organic, eco friendly feel.
Japanese Matches on The Dieline.com
Booths Cheese on The Dieline.com by Blue Tagg
Vodafone London Advertising Campaign
AbduzeedoBooths Cheese on The Dieline.com by Blue Tagg
Also used in advertising campaigns, great effect and beautiful styles.
Sony PSP 3000 Advert Campaign IllustrationVodafone London Advertising Campaign
I think being a good illustrator is a key asset to any design business.
http://abduzeedo.com/when-illustration-meets-typograpy
Date Accessed: 28 Jul 2009
The Die Line
http://www.thedieline.com/
Date Accessed: 28 Jul 2009
PokeStudio
http://www.pokedstudio.com
Date Accessed: 28 Jul 2009
McCord Web Design
http://www.mccordweb.com/e-newsletters/2005/may-05.html
Date Accessed: 28 Jul 2009
Rod Hunt Illustration
http://rodhunt.blogspot.com/
Date Accessed: 28 Jul 2009