http://www.hydrix.com
Qonos is a project being developed by Hydrix, an embedded hardware and software innovation company based in Melbourne, Australia, founded in 2002 by former HP Australian Calculator Operation employees, including Jean-Yves Avenard and Gerald Squelart (also of Meta Kernel fame).
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Operating system:
eCos, running in 512KB SRAM and providing one month of battery life
Linux, running in 64MB of SDRAM and providing considerably more than a day of battery life
Other software:
Emulation of both the HP 49G and the TI-89
Advanced math software: Gnuplot, Giac/Xcas (supposedly better than Maple), MathsExplorer
PDA software: calendar, tasks, notes, time management
Datalogging capabilities
Processor:
Intel PXA 263 XScale processor, running at 400 MHz
32MB of on-chip flash memory
32-bit data bus
Display:
Grayscale 3" 320x240
Full support already exists for a color screen to be offered at a later date
Other hardware:
Mono speaker and microphone
Stereo audio input and ouput ports
Keyboard with tactile feedback designed for fast, accurate data entry
Compact Flash Type II slot
SDIO slot
IrDA port
USB client and host ports, supporting external keyboards, webcams, and other devices
Optional sled:
Vernier probe compatible
8 analog I/O channels
16 digital/sonic I/O channels
Extra high-capacity lithium ion battery
DB-9 serial port
Price:
Over US$350
Timeframe:
Estimated release date of Q4 2004
C'est assez impressionnant.

Ils sont pas mauvais les ex-développeurs de la HP49G...
voir ici pour plus d'infos, des screenshots, etc...