In no particular order:
<br>
<ul>
<li><a href="http://www.hsfortuna.pwp.blueyonder.co.uk/">Dr. H. S. Fortuna</a>'s excellent tutorial series on all things (S)PS2.</li>
<li><a href="http://www.pcs.uklinux.net/id19.htm">Eratosthenes'</a> VU tutorials, due for a rewrite but still with some good stuff in there I think (If you want to help out with the rewriting job, pleeease get in touch!)</li>
<li><a href="http://chortle.ccsu.edu/AssemblyTutorial/tutorialContents.html">Programmed introduction to MIPS assembly</a> - This lovely tutorial isn't so much a MIPS introduction as an introduction to assembly programming itself, it's set at a lovely pace for the assembly beginner, the fact that MIPS assembly is the 'language' of choice is quite a bonus for us</li>
<li><a href="#"></a></li>
<li><a href="http://research.scea.com/">SCEA Research and development</a> - occasionally some good papers come out of here</li>
<li><a href="http://www.nablasoft.com/graphics.htm">http://www.nablasoft.com/graphics.htm</a> This link was submitted by alkampfer, I haven't reviewed the site recently but the start to the tutorial series was looking good.</li>
<li><a href="#">Your link here</a> - Please submit more links if you know of more places to find good information</li>
<li><a href="http://myrkraverk.afraid.org/PlayStation/EmotionEngine/">Myrkraverk's Extremely Short MIPS Assembly HOWTO</a> This HOWTO was updated recently, it seems Myrk's back on the scene.  The author would love people to ask him questions about MIPS/EE assembly so he can add the answers to this HOWTO, so go ask him!</li>
</ul>