"By adding a larger hard drive to a ReplayTV or TiVo, a hacker
can double or even quadruple the number of shows that a PVR can
record - a $250 drive can boost an older ReplayTV box's capacity
from 20 hours to 80."
"The TiVo is particularly popular among hackers, in part because
it uses the Linux operating system that many technically inclined
computer users run on their own PCs. ReplayTV is more difficult to
hack because it uses a proprietary operating system...."
"Hardware hackers typically share their insights on the Web.
Information about hacking ReplayTV can be found at www.
replaytvfaq.com, while comparable TiVo details are at www.tivo
faq.com/hack/faq.html. The AV Science Forum, at www.avsforum. com,
is a popular spot for users of both systems."