The http://consumer.usa.canon.com/ site is where you navigate through to download various PDF manuals and software utilities for your Canon product.
For the Canon 30D, a direct link is provided below:
http://consumer.usa.canon.com/ link
At the time of writing, manuals you can download by clicking the “Product / Software Manuals” link are:
- EOS 30D Introduction Manual (PDF, 6.15 MB)
- EOS DIGITAL Software Guide (PDF, 560 KB)
- EOS Utility Instruction Manual Windows (PDF, 1.69 MB)
- EOS Utility Instruction Manual Macintosh (PDF, 1.56 MB)
- Digital Photo Professional Instruction Manual Windows (PDF, 11.4 MB)
- Digital Photo Professional Instruction Manual Macintosh (PDF, 14.4 MB)
- ZoomBrowser EX Instruction Manual Windows (PDF, 4.97 MB)
- ImageBrowser Instruction Manual Macintosh (PDF, 4.60 MB)
Click the “Drivers / Software” link to access related drivers of software.
Alternatively, refer to this forum post for another method of navigating the site.
For the technically-inclined, there’s a Canon 30D White Paper (PDF format) that you can download from Robgalbraith.com.