I quite like my little Sony NEX-5.
It has a great imaging sensor in a very compact body. Because it is so light I used it with my telescope for astro-photography and was getting good results.
However, the frustrating thing about Sony NEX series is that it does not have a built in automatic timer (intervalometer) and it was not much fun pressing the button on the infra-red remote every 15 seconds.
So I got an inexpensive remote shutter release with timer on ebay. I chose the one for Canon/Pentax because it has 2.5mm jack and I could easily fit a socket onto my IR remote control without damaging it.
Here is a brief tutorial with pictures just in case you have Sony NEX-5 camera and would like to use for time-lapse movies or astro-photography.