On this link, some Photos of DP4 demos during the Sound Shows (february 11-13th)

Xserve:
Single or dual processor, G4 (still) 1.33 GHz (still), 2GB of 333MHz DDR SDRAM, two 64-bit 66MHz PCI slots (plus a third combination PCI/AGP slot), dual Gigabit Ethernet, FireWire 800, USB, four independent ATA/133 drive bays that hold up to 720GB of data, 1U.
Available now from 2799$ (In Europe in march only)

Xserve RAID (at last!)
Companion to the Xserve line of server hardware, this self-contained storage solution holds up to 14 hot-swappable Apple Drive Modules (up to 2.52 terabytes) in a 3U rack-optimized storage enclosure.
Xserve RAID features a breakthrough Apple-designed architecture that combines affordable, high-capacity ATA/100 drive technology with an innovative 2Gb Fibre Channel interface for reliable and fast data access.
Availabe now, from 5999$ ...

Amongst other things, claimed audio imporovements with this update.

Digital Hub and Audio Enhancements:

• Further improves an enhancement introduced with Mac OS X 10.2.3, in which files and folders specific to Mac OS file systems are no longer copied to the disc when burning a CD.
• Improves audio quality for FireWire audio devices.
• Enhances support for mLAN devices.
• Adds support for LaCie d2 48x12x48x disc burners.
• Improves the way voice-activated applications work in Classic.
• Addresses an issue in which audio may not be sampled when using some Mac OS 9 audio applications in the Classic environment.

Edirol released several new control maps for their PCR line of keyboards. These include:
- Propellerheads Rebirth (www.propellerheads.se/)
- Audio Simulations Dream Station (www.audio-simulation.de )
- Audionerdz Delay Lama (audionerdz.com)
- Roland XV-5080 (rolandus.com)

This adds to the impressive list of 50+ freely downloadable control maps for a variety of software applications.

I find out a midi patch software for Mac OSX.

It's a freeware call "MIDI patchbay". It allows to virtually connect all the synthesisers/expanders and keyboard controllors of your midi set.
Many combinations are possible to organise and control all your instruments.
I tested it with a MPU64 (Roland interface) with Mac OS 10.2.3