Early 2000's (2002?) there was a pocket PDA device that ran linux and had a workable keyboard - the Sharp Zaurus SL-5000D (developer edition). 32 Mb RAM! Had a JVM installed. Got mine at Java One with a Linksys 802.11b Network Card. Fun (at the time) to boot up linux and SSH into my servers.

  Processor: StrongARM (206 MHz 32-bit SA-1110)
  Operating System: Linux 2.4 (Embedix)
  Memory: 32 MB SDRAM, 16 MB Flash ROM, 
  Display: 3.5in 240 x 320 pixel, Color Reflective TFT LCD, 16 bits (65,536 colors) 
  Power: Removable, rechargeable 3.7V Lithium-Ion battery pack, Built-in 3.0V back-up battery, 5.0V AC adapter
  Communications: USB Docking Station, IrDA infrared port
  Expansion slot: One CompactFlash Type I / Type II slot, One Secure Digital slot
  Audio: Stereo headphone jack
  Size: 2.90 x 5.40 x 0.80in. (74 x 138 x 21mm)
  Weight: 7.3 oz (206g)