The FindMotif.pl program uses position-specific scoring matrices to search for sequences similar to a consensus sequence. Find more at http://www.people.vcu.edu/~elhaij/IntroBioinf/Notes/PSSM-Perl.html
Thanks for starting such a useful bookmark, hope we will see many more useful tutorial website links over here. I know one webpage which connect to many more bioinformatics tutorial pages.
http://www.thebioinformatica.com/onlinetutorial.htm