This is going to sound naff, but I am currently experimenting with the Facebook Pilots' Logbook.
I hate my current Pooleys JAR-FCL logbook. It's nearly A4 in size, weighs too much and the columns are pretty odd. Still, it's full of memories...
When I get my first job I'll get something more sophisticated for online records and a further paper logbook into which I shall transcribe my flight details.