BTW, i'm a mac user so i have _no_ clue where to start.
(plus i havent even finished fermenting my first batch :-O)
I use Macromedia 8 Suite, in particular Fireworks... although you're on a mac so that doesn't help... I thought mac's were supposed to be top of the line in production software... where's all the neat graphics programs they have???
If you just want to make up some quick easy labels without having to deal with the rigors of learning the ins and outs of Photoshop or The Gimp, just download Avery Design Pro 5 Limited from the Avery website. While not nearly as powerful as the aformentioned programs, with a bit of creativity, you could still crank out something rather decent. Below is an example of a rough idea I cranked out using Design Pro 5.