For conference materials and that sort of thing, hi-resolution (very large .jpg files) of each of the following professional photos (thanks Andrew!) can be downloaded by clicking on the link below each image (recommendation: do a right-click/save-as or equivalent for your OS; the image will take forever to open in a browser).
[1 - hi rez] [2 - hi-rez] [3 - hi-rez]
If you're trying to find me in a coffee shop or something like that, this is probably a more accurate rendition of what I look like on any given day. I'm the one on the right.
