Try wordpress.com . If you can afford $5 per month, then try hosting your own site, and install wordpress on it.
Once you have wordpress or hosted or your own site, get a photoblog theme for it:http://www.smashingmagazine.com/2008/01/08/100-excellent-free-high-quality-wordpress-themes/
Just look for the "8. Photoblog & Videoblog Themes" at the bottom of the page.