powering from 9v battery

[mosfet9]

i'm building an effects box with some digital and analog circuitry and I'd like to power it off one 9v battery or a 9v DC wall wart.  I'll need a +5 supply for my digital parts and both +5 and -5 for analog.  Does anyone have suggestions for the cleanest/most efficient ways to get +/-5 V from 9v?  I'm thinking of using the National lmc7660 for generating -5 from 5.  This device basically gives vout = -vin.  To generate +5, can you suggest a low parts count switching regulator or perhaps another solution?  Thanks.

[gez]

I'll need a +5 supply for my digital parts and both +5 and -5 for analog.  Does anyone have suggestions for the cleanest/most efficient ways to get +/-5 V from 9v? 

Is it so critical to have +-5V?  If you need ground referenced to half supply you can simply use the output of an opamp.  Use amps with CMOS output (rail-to-rail swing) for the audio part and you'll gain the extra headroom (and more) you'd have got using the slightly higher supply.

A 5V regulator is all you need for the digital stuff.  LP2950CZ-5.0 is a battery friendly device.