1-3 colors (color, not simply black and white, but black might be good to be one of the colors). The logo will be used primarily on our website, but also on some print advertising, so black and one other color might be best.
We like the concept of the logo we are currently using (see our website at http://www.portlandpsychotherapyclinic.com), which we came up with ourselves and is based on a Maori symbol meaning "The ability to change in an everchanging world" as that seems to fit with what we help our clients do. Something that plays on that concept might be interesting but that's not a necessity by any means. We tend to like designs that are more organic in nature, that are more fluid and suggestive of shapes found in nature rather than linear and geometric.We are looking for your creativity and help!
A logo is our primary interest, but if it could also be incorporated into a banner for the website, that would be a bonus.
I use Macromedia Fireworks 8 for simple graphics design and manipulation, so something that was in vector graphics and editable in that program would be what I'd want. Photoshop files are usually importable into png files, but I'd want to make sure that it retained its appearance when it was exported to a png file. I think photoshop has the capability to export to png.