I thought people might be interested in understanding the imp’s power behavior in more detail and so I have profiled its power consumption in the various power modes that I am aware of and have attached a report.
I realize that things are only going to get better with time, so think of this as a snapshot of where things are today.
Nice work! We’re working hard on obsoleting your document, you’ll be glad to know 
Can I assume imp.setpowersave(true)
uses about 30-40ma since the radio uses 70ma and active is 100ma?
30+70=100ma
The average may be higher since it still needs to receive occasionally. The cost is reduced latency. Thanks for listening!
What if I do both at once?
setpowersave(true) and wake()
Then only a few millamps?
Is this possible?
imp.setpowersave(true) on a unit with no peripherals configured will idle down to about 7mA (it takes a few seconds to get there, though).