Every AVR programmer worth her weight in ATmegas knows about the AVR Butterfly--a ridiculously low cost ATmega169 demonstration and evaluation kit. Lamenting the lack of such a kit for the ATmega168 drove me to design my own demo/eval kit for the Arduino microcontroller family.
For people who were/are concerned about the cost of the Nokia 61xx display...there is a cheap alternative, that also gets you a nice 3.7v rechargeable battery for nothing. T-Mobile has been selling these phones in Wal Mart, (prepaid cellular thingy), for under 30 dollars...(it might have been about 20 when I picked one up). I'd sacrifice mine, but it works in areas, like my house, with marginal signals where all other phones I tried fail.
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