Before I discovered coppermine today, I had built my own photo management site which sucks compared to this. I got sick of uploading files individually, so I found a tool called JUpload
http://jupload.biz/ that I used to let my friends upload their photos to their own folders on the site. It's a java applet that can be integrated into your site and customized by changing the applet parameters. The documentation (well-written, professional looking PDF) lists all of the parameters and appropriate values. Anyway, I got this tool to work on my site in about 2 hours, and it made it a lot easier for my friends to upload their photos.
I've read some other posts on this forum that cautions against granting batch upload access to users. JUpload can use standard HTTP POSTs or GETs to transfer the files to Coppermine's standard upload processing page. I'm not a lawyer, but I believe JUpload is free for private and educational use, which is what my site is. For commercial use, the licenses start at $62.
I'm new to Coppermine and I don't know if there is API documentation, but if any experienced Coppermine programmers want to take a stab at making JUpload work with Coppermine, I'd be happy to share what I've done on my personal site. I'm going to work on it too, so I'll share any progress I make
Take care
Mark
[edit GauGau 2006-01-29]
This mod has been ported for cpg1.4.x as well - see http://forum.coppermine-gallery.net/index.php?topic=27138.0[/edit]