I've just started playing with the ADXL-345Z-DB development board and wasn't really happy looking at the log file with a spreadsheet program, so I wrote my own logger to display the output in a nicer way, with a few toys thrown in. Apart from being able to zoom and pan around, you can also choose which data set to look at (if you leave the card in and power up again and again, it generates a new set of readings, which I call a "session". You can store heaps of sessions on the card.)
Here's a typical screen shot. If you're interested, I can dump it onto my ftp server and you can have a play - might come in handy.