The Powerbook is dead, it's been replace by the Macbook Pro.
http://www.apple.com/macbookpro/
15.4-inch TFT display with 1440x900 resolution
1.83GHz Intel Core Duo processor with 2MB shared L2 Cache
667MHz frontside bus
1GB (single SO-DIMM) 667MHz DDR2 SDRAM (PC2-5300)
Front Row media center
Remote Control
Built in isight firewire camera
Power adapter with MagSafe Connector, AC wall plug and power cord
100GB 5400rpm Serial ATA hard drive
Slot-load SuperDrive (DVD±RW/CD-RW)
ATI Mobility Radeon X1600 pci express with 256MB GDDR3 memory
MacBook Pro also features a full-size backlit keyboard, AirPort Extreme wireless networking (802.11b/g), Bluetooth 2.0+EDR, ExpressCard/34 slot, dual-link DVI video out, Gigabit Ethernet, USB 2.0, FireWire 400, and optical digital and analog audio in/out.
Starts at $1999.