Industry: Warner Music Group, Linkin Park, Limp Bizkit, Yahoo Music Unlimited, eMusic

Enlisting more star power, Warner Music Group began its debut on the New York Stock Exchange with Robert Plant performing the Led Zeppelin classic Whole Lotta Love.  However, neither P. Diddy's earlier appearances nor Plant's efforts could keep the stock from slipping 60 cents to close at $16.40, a 3.5% drop.

Kelefa Sanneh takes Linkin Park's recent battles with WMG as a jumping off point for a discussion of Limp Bizkit vs. System of a Down.  He points to Linkin Park's concerns over adequate marketing from Warner Music to segue into a discussion of Limp Bizkit's recent album release that Sanneh characterizes as "secret."  However, as recently noted here at ProHipHop, Billboard reported that Fred Durst did not want a traditional marketing campaign and used Limp Bizkit's blog to promote viral distribution of an MP3 single.

The introduction of Yahoo Music Unlimited, a digital music subscription service, not only affected the stocks of competitors but raised questions about Yahoo's willingness to lose money on the deal since the service is priced below a profitable level.  Yahoo is expected to rollout the service internationally in "all countries with a Yahoo music site" but no dates have been announced.

eMusic, billing itself as the "world's No. 2 digital download service", recently announced the addition of tracks from labels in multiple genres.  Newly added hip hop labels and artists include:
" - Babygrande Records - Featuring Jean Grae, GZA/Genius, Jedi Mind Tricks.
- Anticon Records - With Sage Francis, Themselves, Buck 65 and more.
- Shamanwork - Brings MF Doom.
- Quannum - Brings Blackalicious members Latyf, Lyrics Born."