Darren Hoyt from darrenhoyt.com and Ben Gillbanks from binarymoon had work together to released this wonderful script that generated a very flexible and wicked thumbnails creation called TimThumb.
I myself already installed this wonderful script to the site and now caching of the frontpage custom field images are faster since before that i was using the same big images from custom field with a image resize but the file size to load are the same as big image so you can imagine how the site loads will be effected.
With the TimThumb script, now all custom field images are auto crop or tonedown so the usual 100kb images are now only 50kb so to speak…even slight improvement on the site loading already enough to make me happy 
Darren well known for his creation of Mimbo series and Ben Gillbanks a wordpress wiz that created the bm custom login and the widely used bm trackback and pingback separator started the work during the release of mimbo pro and releasing the script as an open source program 
Finally thanks to Darren and Ben for this great work 
if you just like me who hate to created 2 separate custom images (big and small image) to associated with one post, this script definately worth a try..server management and script installation can be found at the script release page
Glad you’re making use of the script, and thanks for the mention
I was looking for this exact functionality for several of my blogs as I have a lot of user generated content and this would make things much easier. Thanks loads.
Glad i subscribed to your feed now
Thanks 4 droping by Darren…
you’re the man…save me loads of loading time when browsing my own site…
you’re welcome David..come again alright
the script is really nice and easy to work with surely a big time saver
As with the above comments, I would just like add that indeed the script is very useful!
What you’ve stated are all true. The script is of great usage and simplicity. It saves my time indeed.
There is another alternative: the post thumb plugin for WordPress. Creates thumbs based on your image in your post with a lot of options. For some odd reason, the script does not work on my blog and I was happy to knew the existence of post thumb. http://wordpress.org/extend/plugins/alakhnors-post-thumb/
Great script … help me to make faster my site. Thank for the writer
looks interesting, let me try it to your box tube theme
Its good for creating a plug-in for giving the thumbnail images per category.
The script is of great usage and simplicity. It saves time alot
Why dont you create a wordpress plug-in for this purpose using the same script ?