Read up Photocrati's T1i/ 500D review, where you'll find a couple of web-resized photos (one macro, one candid, miscellaneous pics) shot with the EF-S 18-55 IS lens.
The 430EX Speedlite flash was used for some of the images.
Jack has the following remarks on the 18-55 lens:
I was happily surprised by the lens’s performance. I don’t think Canon souped-up sharpness and contrast in the T1i to make up for possible deficiencies in the lens optically, since I also tested it with one of my regular Canon zooms. So I’d have to say, in terms of sharpness, contrast, and color rendition, this lens appeared to hold its own. Another pleasant surprise was the close-focusing limit, at just under 10 inches.