Steven Snell has compiled "The Ultimate Collection Of Free Vector Packsf" for your downloading pleasure at Smashing Magazine. Here are just some of the topics:

Abstract Blobs and Bursts
Birds in Flight
Characters
Circles
Dinosaurs
Fingerprints
Flowers
Foliage
Garden Symbols
Hand-Drawn Decorative Ornaments
Ink Scribbles
Lines, Swirls and Patterns
Modern Arrows
Night Lights
Office Objects
Photo Frames
Power Tools
Safari and Zoo Animals
Signs
Skaters
Sneakers
Speech Bubbles
Spirals
Stars
Trees
Trendy Circles
Wavy Ribbons
Weird Bubbles
Winter Sports

For all the links, and to see sample illustrations, go to "Smashing Magazine."