"Excel 2007 raised this limit to 1,048,576 rows (and 16,384 columns)"

Yes, shure. But who likes to have a spreadsheet with 1,048,576 rows ;-)

I'm just wondering about how i would do something like this.

Even splitting such a large log by timestamp into different worksheets is no fun.

But what else? Perhaps putting the whole stuff into a database and write some stored procedures that do the dirty mangle job(s) a.s.o...?

Best regards, Karl