8 channel E*G with AVR and bluetooth

Not wanting to wait for a kickstarter I decided to throw together a board.

My specialty is NOT analog circuitry, however I have a seasoned analog
engineer friend who is going to check the design for me.  Seasoned as in
used to work with vacuum tubes.  ; )  He is currently a consultant and
usually has a medical or aircraft client on the bill.  I'm very lucky to
have his donated assistance.  He has NOT looked at these drawings yet...

He isn't a specialist in this field, so I was hoping a few on the list
would help.

The main features are:

-ADS1299 front end
-ATmega168 running at ~11mhz (+ odd frequency digits for perfect serial
data rates) to be a SPI to serial bridge and limited intelligence
-RN-41 serial bluetooth adapter for communicating with a computer
-LDO regulator with a low voltage shutdown circuit at 3.1v, startup at 3.25v
-Lithium battery cell with onboard charger (A DPDT on-off-on switch moves
the battery from charger-off-device to provide 100% isolation)

Any comments/suggestions would be great.  If it works I plan on building
4-5 for my use, and could possibly order PCBs for others.  I plan on only
ordering 3 prototype PCBs

Gerber files will be available to anyone who wants them too.

Other than more blinking lights, power supplies for the ADS1299, and
changes to the filter stage, this should be a good start.

I'm leaning on removing the integrated charging circuit and also changing
the AVR to a surface mount package.  I plan on waiting until routing takes
place to make the decision on the AVR and just need to think hard about the
charging circuit.  That might come down to PCB space too.

If the attached files don't make it through the list serv,
Here is the root:
https://drive.google.com/file/d/0B02kTn5EGn1bNEF0elRfYjNEdGs/edit?usp=sharing
Here is the filter:
https://drive.google.com/file/d/0B02kTn5EGn1baVBXMnEwdUxJMWc/edit?usp=sharing

Thanks,
Grant

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