And plese don't say the search should use the boolen "NOT people" because I would bet most people do not even know this can be used in a search.

I think the boolean searching is a good point. It can definitely help in eliminating some stuff. As far as spam, it's a tough call. I've seen IS eliminate terms that have gotten me downloads at Dreamstime. Granted some keywording is just abusive, but I think there should be some room for conceptual terms. Finally, I could see the "peopless" searches being handy. If I'm looking for a good background to Photoshop a product like a car onto, sometimes the people get in the way.

For those of you having trouble resizing images, this how I do mine:

http://illustrationinfo.com/?p=177

It saves me a bunch of time and hopefully it helps you too.

I've been thinking this for a while as well. The comment about breaking out of your comfort zone or diversifying your portfolio makes sense. It's just hard to get away from what you like doing.

Everybody's experience is different, but I can't imagine making the same amount of money on just IS alone. I think trying out the other sites is a good idea. Besides, don't you want to get the referral income for your friend on all the different sites?

As far as different formats for different sites, I use Action scripts in Illustrator & Photoshop and the Automator on the Mac. That helps speed things up.