Heres a few links that might help you.
Excellent Greek/English Dictionary Click Here
Learn Greek Online! Click Here
KATERINA SARRI's Links Page Probably the most comprehensive on the net! Click Here
The Greek Language and Computers. [PC and Mac] Need Greek fonts? Trouble getting your computer to recognise Greek You will probably find the answer here.Click Here
Five easy lessons to start you off. Courtesy of agni.gr Click Here
Slightly more advanced learning On a free hosted site so watch out for the adverts :-) Click Here
The BBC's excellent little offering Click Here