BtBx (presumably pronounced beatbox) is a new beat making App Store app. It is like a cheaper, simpler, and more polished version of BeatMaker. Read on for a full review and screenshots. » App Store: BtBx (music sequencer)

Super Monkey ball is one of the best selling games on the iPhone, however, it is missing one valuable feature…the ability to play your own music from your iPod while playing the game. However there is a very easy work around. click the link to see simple step by step instructions. » How to play “your own” music in Super Monkey Ball.

SynchStep back from installer in 1.1.4 has been updated to 2.0. “SynchStep (Beta) automatically detects how fast your walking, and plays songs from your music library to match your pace.” Read on for more tips and requirements. » Cydia – SynchStep 2.0

Raijin and Fujin are 2 DJ player scratch tools made for the iPhone and iPod Touch that will be available in the appstore soon. Both of the dj tools have the same functionality except for the placement of the buttons, this will make it easier if you want to place them next to your mixer. The apps have a tapcounter, JogDial, cue button, playtimer window and a pitch control. They also have a BPM display that will be active when the tapcounter is activated.
» AppStore – DJ scratch tools Raijin and Fujin for the iPhone

SharedPod is a cool little app that you can use to manage your music and videos without using iTunes.
SharePod is a lightweight music management program for your iPod. You can copy music and videos between your iPod and computers usually without having to install anything on the computer. The good part is that since version SharePod 3.8.4 Beta2 the iPhone and iPod Touch are supported.
» SharePod supports iPhone and iPod Touch

NYTimes’ Technology blog reports that Apple is currently in active negotiations with music labels about providing more mobile music content on their iTunes store.

One executive quoted specifically states that “[Apple wants] a big launch in June”, presumably referring to the Worldwide Developer Conference (WWDC) scheduled to start on June 9th 2008. However, since negotiations only started a few weeks ago, the deals may not be in place in time for a WWDC announcement.
Apple reportedly wants to expand its Ringtone library and introduce the sale of “Answer Tones”. Answer Tones are customized sounds played to callers instead of the traditional ringing sound.

Another area of negotiation is the distribution of iTunes songs over the cellular network. For now, the iPhone allows you to purchase iTunes music only over Wi-fi networks. This had been thought to be a limitation of the slower EDGE data network, but it appears this mobile music distribution must be specifically negotiated with the record labels.
» Apple in Mobile Music Negotiations… for WWDC?

SynchStep is a cool new little app.

The app plays songs from your music library that match your walking pace.
Every step you take lands in-time with a drum hit, a bass pluck or a piano chord.
So the next time you’d like to walk around like John Travolta with some Bee Gees music, use SynchStep :)
» SynchStep plays music on the rhythm of your steps