Calling itself the "hub of MIDI on the Web," The MIDI Farm has excellent resources for those wanting to learn more about MIDI. Select the "MIDI Information" link.

Select their "MIDI" link for information about MIDI.

Visit MIDIWorld, and select the "MIDI Basics" link.

Offers MIDI tools and resources, discussion forums, and documentation.

Check out their "MIDI FAQ" and "MIDI Intro" pages.

Great selection of MIDI hardware and software and excellent prices.