Sounds like you could use an audio interface for your pc -- lots of them are reasonably inexpensive and have a preamp built in to boost your signal. I use a Presonus Firebox (ebay $200 or less, used)which works well with my laptop and connects with a firewire cable so I can monitor realtime doing multiple tracks. If you just want to get the sound there and dont need multitrack, you can get a USB interface with a preamp cheaper.
This is, of course, assuming that you are using your Pono with the factory passive pickup I've seen you mention elsewhere.
I'm pretty new so I'm sure others here with more experience in this area may have some more efficient (money-wise) ideas for you.