Here is the official word from Apple following the WWDC keynote address regarding the new Mac Pro desktop computers:

Apple today unveiled the new Mac Pro, a quad Xeon, 64-bit desktop workstation featuring two new Dual-Core Intel Xeon processors running up to 3.0 GHz and a new system architecture that delivers up to twice the performance of the Power Mac G5 Quad (Based on estimated results of industry-standard SPECint and SPECfp rate tests. SPEC is a registered trademark of Standard Performance Evaluation Corporation (SPEC); see www.apple.com/macpro for more information.). With advanced performance, greater expansion, higher performance graphics options and unprecedented customization, the newly designed Mac Pro is the ideal system for the most demanding user. The introduction of the Mac Pro marks the completion of a rapid and seamless transition for Apple, with the entire Mac family now using Intel's latest processors.

The Mac Pro is shipping today with the standard prebuilt configuration, including two 2.66 GHz Dual-Core Intel Xeon processors and priced at USD$2,499, through the Apple Online Store, Apple's retail stores and Apple Authorized Resellers.

The Mac Pro, with a suggested retail price of $2,499 (US), includes:

• two 2.66 GHz Dual-Core Intel Xeon processors;
• 1GB of 667 MHz DDR2 fully-buffered ECC memory expandable up to 16GB;
• NVIDIA GeForce 7300 GT with 256MB of GDDR2 SDRAM;
• 250GB Serial ATA (3Gb/s) hard drive running at 7200 rpm;
• 16x SuperDrive(TM) with double-layer support (DVD+R DL/DVD+/-RW/CD-RW);
• four PCI Express slots: one double-wide graphics slot and three full-length expansion slots; and
• ships with Mighty Mouse and Apple Keyboard.

In addition to the standard configuration, the Mac Pro offers more than 4.9 million build-to-order options including: two 2.0 GHz or 3.0 GHz Dual-Core Intel Xeon processors; up to 16GB of 667 MHz DDR2 fully-buffered ECC memory; up to four 500GB Serial ATA hard drives running at 7200 rpm; up to two 16x SuperDrives with double-layer support; ATI Radeon X1900 XT and NVIDIA Quadro FX 4500 graphics cards, both with 512MB of GDDR3 SDRAM; AirPort Extreme module, Bluetooth 2.0+EDR module; Apple USB Modem; Apple Wireless Keyboard and Apple wireless Mighty Mouse; Mac OS X Server Tiger; Apple Xsan; and Apple Fibre Channel PCI Express Card. Complete build-to-order options and pricing are available at www.apple.com/macpro.