Saw an interesting article in a Norwegian newspaper (won't include a link as it's all in, well, Norwegian...) but they were explaining a method for dealing with slugs which sounded quite tempting, if a bit fiddly at first!
First, you get your nematodes (bearing in mind that they should be treated like fresh goods and so and so forth). Now collect a bucket-full (or thereabouts - what's the collective noun for a lot of slugs? A head-ache?) of slugs - the article suggested getting your neighbours to help out as well, the bigger the area you treat the more effective it'll be. Prepare a 'solution' of nematodes and lukewarm water in a bucket, dip a colander of slugs in the solution, cut the slugs in two and put them back in the solution to soak for a bit (doesn't say how long, but I'd guess half an hour?). Now put the slug-bits around the garden in slug-friendly places and afterwards pour the rest of the solution over them. The other slugs in the garden will apparently now smell this, find it irresistible and come zooming over to gorge themselves cannibal-fashion, thus picking up the nematodes and thus spread it around.
They say this is much, much more effective than simply spreading the nematodes as per the instructions on the packet and claim this rid their whole neighbourhood of slugs in two years.
I'm not quite sure what to think about it myself - if it really does work, that is! I mean, what about the other animals and birds that eat slugs? If I was certain it wouldn't affect all the lovely birdies around here I'd probably give it a go - or am I being silly? :-\