Lugnet which contains archives
from all LEGO oriented newsgroups. The hierarchical organization of the
archive is easy to navigate and the search capabilities are perfect for
finding any topic ever written about. You will probably want to start in
Robotics or even RCX.
Kekoa Proudfoot is the "minor deity" resposible for figuring
out RCX Internals
Russell Nelson has another useful page on Lego Mindstorm Internals
which provides links to every site describing an RCX hack or hint and a
description of the contribution made by that site/individual
RcxCC: developed by Mark Overmars of Utrecht Univ., is a very high-quality IDE (integrated
development environment) for NQC. It (unfortunately!)
currently runs only on Windoz.