From DP Review :
http://www.dpreview.com/news/0602/06022114canoneos30d.asp
New features / changes compared to the EOS 20D
* Redesigned body (more EOS 5D like)
* Larger LCD monitor (2.5")
* Soft-touch shutter release button
* AE/AF lock remains set if shutter is kept half-pressed between shots
* Faster startup and wake from sleep times
* Direct print button on rear of camera (woo!)
* Spot metering
* 100,000 shot shutter cycle
* ISO selectable in third stop steps
* ISO speed shown in viewfinder as you change it (still not once changed though)
* Selectable 5 or 3 fps continuous shooting
* PictureStyles instead of simple image parameters
* 9,999 images per folder (instead of 100 as per the EOS 20D)
* 15 menu languages (3 new)
http://www.dpreview.com/news/0602/06022114canoneos30d.asp
New features / changes compared to the EOS 20D
* Redesigned body (more EOS 5D like)
* Larger LCD monitor (2.5")
* Soft-touch shutter release button
* AE/AF lock remains set if shutter is kept half-pressed between shots
* Faster startup and wake from sleep times
* Direct print button on rear of camera (woo!)
* Spot metering
* 100,000 shot shutter cycle
* ISO selectable in third stop steps
* ISO speed shown in viewfinder as you change it (still not once changed though)
* Selectable 5 or 3 fps continuous shooting
* PictureStyles instead of simple image parameters
* 9,999 images per folder (instead of 100 as per the EOS 20D)
* 15 menu languages (3 new)