Lookin' good. I bought two of those blank PCB when Bob made them available. Built just one up so far and real happy with it. I didn't mount any regulators to mine yet, just jumpered Vcc to the DC jack and plug a regulated +5vdc to it. I'm using one of those cheap Asian CP2101 serial cables and it works fine.
Be sure to make the the small change to the bubuino variant file: pins_arduino.h or the pin mapping for the analog pins will be wrong:
// #define analogPinToChannel(p) ( (p) < NUM_ANALOG_INPUTS ? NUM_ANALOG_INPUTS - (p) : -1 )
#define analogPinToChannel(p) ( (p) < NUM_ANALOG_INPUTS ? (NUM_ANALOG_INPUTS-1) - (p) : -1 )
Might be a few other changes to the maniac supplied files, I don't recall at the moment.
EDIT: Some people were having reliability problems with the serial port working on the 1284P DIP (but not on bobuino boards!) and lots of different fixes were tried to different effectiveness, but what seemed to nail it for experiencing such problems is changing the low fuse byte to use full swing oscillator: bobuino.bootloader.low_fuses=0xf7
So probably a good change to make on general purposes.
EDIT2: By the way getting a 644P working on this board is a piece of cake just add new board entry:
##############################################################
bobuino644.name=Bobuino 644P optiboot
bobuino644.upload.protocol=arduino
bobuino644.upload.maximum_size=63488
bobuino644.upload.speed=115200
bobuino644.bootloader.low_fuses=0xff
bobuino644.bootloader.high_fuses=0xdc
bobuino644.bootloader.extended_fuses=0xfd
bobuino644.bootloader.path=optiboot
bobuino644.bootloader.file=optiboot_atmega644p-4-5.hex
bobuino644.bootloader.unlock_bits=0x3F
bobuino644.bootloader.lock_bits=0x0F
bobuino644.build.mcu=atmega644p
bobuino644.build.f_cpu=16000000L
#bobuino644.build.core=arduino:arduino
bobuino644.build.core=standard
bobuino644.build.variant=bobuino##############################################################
And here is a optibootloader setup for the 644P: optiboot_atmega644p-4-5.hex
:020000000504F5
:10FC0000112484B714BE81FFF2D085E08093810077
:10FC100082E08093C00088E18093C10086E08093F9
:10FC2000C20080E18093C4008EE0CBD0209A86E0B1
:10FC300020E33CEF91E0309385002093840096BB55
:10FC4000B09BFECF189AA8958150A9F7CC24DD244B
:10FC500088248394B5E0AB2EA1E19A2EF3E0BF2E69
:10FC6000A4D0813471F4A1D0082FB1D0023811F49E
:10FC700085E005C0013811F484E001C083E08DD037
:10FC800089C0823411F484E103C0853419F485E01D
:10FC9000A6D080C0853579F488D0E82EFF2485D0A1
:10FCA000082F10E0102F00270E291F29000F111F09
:10FCB0008ED068016FC0863521F484E090D080E05A
:10FCC000DECF843609F040C070D06FD0082F6DD0E1
:10FCD00080E0C81680EED80618F4F601B7BEE895A5
:10FCE000C0E0D1E062D089930C17E1F7F0E0CF16C5
:10FCF000F0EEDF0618F0F601B7BEE89568D007B65B
:10FD000000FCFDCFA601A0E0B1E02C9130E01196FF
:10FD10008C91119790E0982F8827822B932B129625
:10FD2000FA010C0187BEE89511244E5F5F4FF2E0A7
:10FD3000A030BF0751F7F601A7BEE89507B600FC53
:10FD4000FDCF97BEE89526C08437B1F42ED02DD0D4
:10FD5000F82E2BD03CD0F601EF2C8F010F5F1F4FF8
:10FD600084911BD0EA94F801C1F70894C11CD11CFE
:10FD7000FA94CF0CD11C0EC0853739F428D08EE10F
:10FD80000CD086E90AD08AE07ACF813511F488E078
:10FD900018D01DD080E101D063CF982F8091C00092
:10FDA00085FFFCCF9093C60008958091C00087FF27
:10FDB000FCCF8091C00084FD01C0A8958091C60051
:10FDC0000895E0E6F0E098E1908380830895EDDF08
:10FDD000803219F088E0F5DFFFCF84E1DECF1F939A
:10FDE000182FE3DF1150E9F7F2DF1F91089580E04B
:08FDF000E8DFEE27FF2709946C
:040000030000FC00FD
:00000001FF
Lefty