These links may change over time but this will give you a good starting portal.
BOOK SUPPORT AND ADDENDUMS
Hal Leonard Web Site The Music Office Web Site
PERFORMING RIGHTS, RECORDING AND ENGINEERING ASSOCIATIONS
UNITED STATES  
ASCAP BMI
SESAC LIBRARY OF CONGRESS
HARRY FOX HARRY FOX (songfile.com)
NARAS (Grammy) AES (Audio Engineering Society)
RIAA (antichrist of art)  
THE WORLD  
APRA/AMCOS (Australia-New Zealand) SABAM (Belgium)
SOCAN (Canada) KODA (Denmark)
STEF (Iceland) IRMO (Ireland)
TEOSTO (Finland) SACEM (France
GEMA (Germany) JASRAC (Japan)
BUMA/STEMRA (Netherlands) TONO (Norway)
SGAE (Spain) SUISA (Switzerland)
MCPS/PRS (U.K.)  
COPYRIGHT RESOURCES
Cornell University - Copyright Law U.S. Copyright Office
Cornell University - Copyright Regulations U.S. Patent & Trademark Office
Cornell University - Search Court Opinions Benedict Copyright Resources
Copyright Society of U.S. Berne Convention Treaty
World Intellectual Property Organization  
OTHER U.S. MUSIC CLEARANCE
EMG Music Clearance Parker Music Group
Signature Sound  
MUSIC PUBLISHING ASSOCIATIONS
NMPA (U.S.) MPA (U.S.)
NPN (Nashville) SMFF (Sweden)
SONGWRITER ASSOCIATIONS & RESOURCES
National Folk Alliance Songwriters Guild of America
International Songwriter's Guild Songwriters.org
RECORD LABELS, MUSIC PUBLISHERS and DISTRIBUTORS (Lists)
Dirty Linen's Label List Indiana University Label List
Wikipedia Major Label Family Tree Wikipedia Master List
All Record Labels.com Record Label Resource List
More Music Label & Distributor List Spraci List
The DJ List A2G Music Database
World Music Label List The Recording Industry.com
Heavy Metal List Band Guru Label List
MUSIC MEDIA
American Songwriter CMJ (College Music Journal)
Independent Songwriter Jeff Mallett's Songwriter Site
Rolling Stone Song Link International
Billboard Magazine Alternative Press

Amazing Sounds

 Babble & Beat
Blender Chart Attack (Canada)
Glide Mojo
Innerviews.org Music Box
NME Paste
Q for Music (UK) Soul Shine (Canada)
Spin Uncut (UK)
The Wire (UK) Blues & Rhythm (UK)
Downbeat Mix Magazine
Living Blues American Hit Network
Aversion Backstreets
Big Takeover Crawdaddy!
Decibel JamBands
Music Emissions New York Rock
Rock Around the World Rock Sound (UK)
Country Line Country Standard Time
Country Weekly Highwaykind
Nashville Country Rockzillaworld
MusicDish Undercover
Offbeat Relix
Nude as the News Exclaim!
Unrated Music In Music We Trust
Performing Songwriter Filter
Straight No Chaser (UK) AtNZone
Alternate Music Press Blue Coupe
Delta Boogie Jelly Music
Hollow Ear Plum Noir
Music Merchandise Review Roots World Music
Playing In Fog InterMixx Webzine
Serge Entertainment Group Nefarious
Air Massive All Access
Beat Surrender (UK) RPM Direct

Music Hurts

 Planet Verge
US Music Vault Megalomaniac
Red Alert Loud
Dazed & Confused BMI Musicworld
Clash Music  
ONLINE LEARNING
Stanford Technology Law Review
Indiana University Publisher Portal List
UCLA Copyright Infringement Group
Music Law Information at musiclaw.info
Music Law Primers at FreeAdvice.com
Starving Artists Law Site
Cyber Playground Music Business Links
Music Law at GetSigned.com
Legal and Other Resources at FutureOfMusic.org
Duhaime Online Legal Dictionary
The Purpose of Copyright by Lydia Pallas Loren
Barry Shrum - Music Legal Commentary
Electronic Frontier Foundation
Internet Law Wire (University of Pittsburg)
Berkeley Technology Law Journal
Shidler Center For Law, Commerce & Technology
The Rights Workshop
ICANN Domain Name Dispute Resolution Policy
Attorney Michael Kakuk shares information
Intellectual Property Issues at FindLaw.com
Virginia Journal of Law & Technology