Forgive my ignorance if I missed your point, but this is more of a SOC than just a processor; from the article: "The KL02 has 32k of flash memory, 4k of RAM, a 32 bit processor, and peripherals like a 12-bit analog to digital converter and a low-power UART built into the chip."

The LPC1102 has more or less all of those things as well. The ADC is not as high resolution, but that's really it. You can head over to Mouser and buy it for a couple of dollars and use it immediately (product number 771-LPC1102UK118). In comparison, the chip mentioned in the article is essentially a one-off run for a specific unnamed customer, and does not, for all practical purposes, exist to mere mortals like us.

The LPC1102LVUK is a microcontroller, just like the KLO2. 8K SRAM, 32K Flash on-chip, ADC, UART, SPI, built-in oscillator, GPIOs, etc.

Wow! Those are teeny! I've never seen microcontrollers that small. That'd make a pretty nice sized Arduino if Atmel made 328's that size.

Same Kliment from #reprap?

They do, more or less.

http://www.atmel.com/devices/ATtiny1634.aspx

None of those come in a package nearly as small.

The data sheet claims that the ATtiny1634-UUR is 2.38x2.02mm, which to me does not seem all that much larger than the chips under discussion.

Ah, you are entirely correct. I didn't see the -U in the listing on Atmel's site, but it is indeed in the datasheet. The ball layout is a pain to route though, 0.4mm pitch.