I have the Michael Cain BASE logbook for the IPhone and it is pretty slick. I believe I only paid .99$ for it. I have issues logging jumps on paper for some reason but seem to log them better electronically. You can also import and export data and email the files so you have backup and paper.
I have been using an Excel spreadsheet with one tab for each year + Totals page at the end with sums for each category: Total Jumps, Tandems, BASE, Objects, and everyone's favorite... Cutaways.
If you run a search you can find it on here and use it for free. Easy thing to back-up and fast/simple to update once a week.