Links to some Tinnitus resources you may fine useful...
American Tinnitus Association.
Wikipedia's Tinnitus page.
Sifynews has an interesting brain related article on tinntius.
Here the Mayo Clinic defines the word
Medline Plus with lots of resources.
eMedicineHealth has a great diagram of the
ear in relation to the condition.
First blush, dizziness and balance's page looks pretty heavy duty, couple of nice diagrams.
US National Institute on Deafness and other
Some general information from American
Speech Language Hearing Association.
More general information, this time from American
Academy of Otolaryngology Head and Neck Surgery.