Personally I found it worth shelling out the 20 drinking vouchers on
GALS, despite the slightly Beta-ish status and a few shortcomings. It works very well, has popup definitions as well as click throughs. And the stats keeping is interesting, being able to see how many folk actually click through to a given definition.
Maybe not as much fun as writing your own, but if you are pressed for time, definitely worth a look.
-- hugh