I've seen some autoblogs lately and I noticed that when automated posts are put up, they automatically come up with thumbnails on the front page. As an example of one such autoblog, rapidweightlosssolutions.com, if you scroll down to the "rapid weight loss" section, i'm pretty sure that all of those posts are automated - what plug-in are they using to also grab random thumbnails to put up on the front page?
TRAN318, have you seen this one @ www(dot)sanisoft(dot)com/blog/2010/04/19/wordpress-plugin-automatic-post-thumbnail , I think thats what you are looking for, let me know. -BlastFree
They use timbthumb scipt which is mostly included in wordpress theme already. But there are also some plugins like Simple post thumbnails (search on Wordpress) I hope it helps.
i use Get The Image,.. easy to use,.. and still can show thumbnail,.. even image that stored inside your post is from other site (not stored inside your own host) see little example here : http://www.autoblogtheme.info/theme...automatically-with-get-the-image-plugins.html