Anthony Lasenby's keynote
address at the SIGGRAPH 2003 conference in San Diego. 
Powerpoint
file. Movies are also available here. 
'Geometric Algebra and Quantum Information
Processing' by Chris Doran. A series of lectures given at a joint
Cambridge/MIT workshop on quantum computing. 
Files avalaible in pdf format. pdf1,
pdf2, pdf3, pdf4. 
'Applications of Geometric Algebra
in Electromagnetism, Quantum Mechanics and Gravity' by A.N. Lasenby,
C.J.L. Doran and E. Arcaute. Talk delivered at the Sixth International
Conference on Clifford Algebras and their Applications, Tennessee
2002.

Accompanying paper 
'Classical and Quantum Dynamics in a Black Hole
Background' by Chris Doran. 
pdf file. 
'New Advances in Geometric Algebra' by Chris Doran.
Talk delivered at the workshop 'Uncertainty in Geometric Computation',
Sheffield, July 2001.

Accompanying paper,
and talk in pdf. 
The talk 'Geometric Algebra, Dirac
Wavefunctions and Black Holes', by Anthony Lasenby and Chris Doran,
given at the conference 'Advances in the Interplay between Quantum
and Gravity Physics', Erice, 30 April  10 May 2001. 
Accompanying paper. 
SIGGRAPH 2001 talks on applications
of geometric algebra, and more advanced topics in geometry. Available
in pdf format. 
Applications
(pdf)
G eometry (pdf) 