The reason a lot of you are getting droplets out of focus is also down to the flash power output/ flash duration...it is bit of a science, but in simple terms.......
my top tip of the day is turn the power right down on your flash gun, and move the flash closer - it will improve the sharpness of the drops massively.
So if you are using a ratio of 1:1 at say 3 feet, try switching to a ratio of 1:64 at approx 8inches (approx)
Ignore your shutter speed for this type of shooting as it has no influence on what you are doing - here we are dealing with flash speed.
Flash fires approx at 1/30,000 of a second when powered down, more than enough to freeze water droplets.
Stick your camera on bulb - 400 iso - F11, and flash settings as above and control the light with your flash to subject distance.
there are some good tips on here, Kev is a local photographer to me with years and years of experience.
Also check out his Pellet photography....that is talent!!!!
http://www.photosbykev.com/wordpress/tips-and-trick/water-droplet-photography/