None of my first attempt at stock photography were accepted for istock.  The reasons were composition and impact and suitability for stock.  These are the three I submitted:

http://dl.dropbox.com/u/16190936/wildanimalpark_247_wtm.jpg

http://dl.dropbox.com/u/16190936/la%20costa%20pools_325_wtm.jpg

http://dl.dropbox.com/u/16190936/kylie%20hall_wtm.jpg

Yes, I'm a novice photographer, so be gentle.  I guess the water park one has a bit of a snapshot feel to it.  Not sure how to fix that.
A few I have thought of submitting:

http://dl.dropbox.com/u/16190936/drivingmarathon_351_wtm.jpg

http://dl.dropbox.com/u/16190936/faith%20hat%2012_wtm.jpg

http://dl.dropbox.com/u/16190936/fall_026_wtm.jpg

http://dl.dropbox.com/u/16190936/wildanimalpark_099_wtm.jpg

http://dl.dropbox.com/u/16190936/foxes%20300%2014_wtm.jpg

I hope this image thing works.   Thanks for all the help in advance!