I like the concept of Apple's Time Machine, but do not need it to run every hour -- more like once per day would be adequate for me as I don't copy everything, just my normal data files and documents. So I went online and searched for some way to adjust the schedule and found a nifty little piece of freeware called Time Machine Editor. With it you can schedule TM to run whenever you want from hourly to a few times per day to once per month. Anyway it's free and seems to be working as advertised: http://timesoftware.free.fr/timemachineeditor/
Cheers,
Cheers,