I do a lot of work with Illustrator, but I've never been super happy with how my work looks on our website. I've tried various techniques - saving from Illustrator, and opening in Photoshop and saving - but I'm still missing something.
Ed. The logo was only ever supplied as AI. I get the same slightly fuzzy result whether I'm saving for web & devices from Illustrator, or taking the vector into Photoshop. I tend to scale in Illustrator to the required size, and then save for web (inc type optimised - there's text in the logo).