Hi Giglshit,
I have spent the last few weeks building various iterations of a solid-body, steel string, single pickup uke and I'm loving the project.
Whether you decide to go for an amplified acoustic (under saddle/piezo pickup) or a full blown electric, you're going to enjoy the journey.
Not to downplay UU but there is a great deal of info at
http://www.cigarboxnation.com, definitely worth a look. That site is dedicated to unconventional stringed instruments of all sorts. (Fretless three string electric guitar made from an aluminium pole, anyone?)
For myself, my own build is decidely ghetto but looking through the picture gallery on the above site gave me lots of ideas for this decidedly unconventional instrument.
If you're interested in what I've done with my own build, I have detailed some of my own build
here
Happy to share what I've learned. One thing I will say though is decide what scale you're building, If you don't know what I mean by that, then you're at the same place I was about three weeks ago.
Good luck.
E.E.