I can offer up my OS X 10.5.6 PPC beta testing ....
But I probably won't end up using it . No offence intended here Mr Shirik but I don't think it meets my needs.
I update only every week or so off email updates in a folder in my email. I prefer to examine every change log to see if it's a major update , minor update or if it's an update i'm either interested in or need.
This whole process only takes me 15 mins or so.
I guess my perfect updater program solution would be one that gets these emails out of my email box , examines them for specificed tags then downloads and installs them automatically , giving me a report.
Not really feasible but I'm happy with my current updating method.