With the price of hard drives so low at the moment i was wondering if there has been any advances in software to allow for 500+gb hard drives?

Most of the faqs etc are dated in 06 and im yet to find any recent articles to support if they work? The system iam thinking of installing twin segates is a Tivo Philips Series 1 PTV100 DVR.

Help would be greatly appreciated in advance. Thanks Daniel