Hi all,
For those of you interested in tennis video instruction, Wil Hamilton has a great (free) instruction site, called FuzzyYellowBalls, here:

http://www.fuzzyyellowballs.com/

For discussion on tennis and tennis technique, this is a good forum:

http://tt.tennis-warehouse.com/

I've been playing tennis all my life, am now retired, but still play about 8 hours a week. Played interclub for a Zürich club for close to 30 years (1st and C leagues and Senior B league). Played tons of tournaments in the Zurich area, am now in Lugano. It is a great sport! Can't do without it...