Client logging Question

[Pericynthion]

Slightly off-topic, but does anyone have any good suggestions on how to generate something like the attached client log from the ASUS wireless log? (this output is taken form an Apple airport using the old utility)

I can probably script something to extract the data by parsing the wireless logfile and squirting out a text file I can manipulate in excel or something, but wondered if anyone had already done something more intelligent.