Dawn, I love that Glass with A Past site and it's various ideas with molds!
I need to go over to it and have a good poke round - I get given random glass objects, interesting coloured bottles, etc, all the time - something I am sure lots of glass artists get!
Whilst I don't think slumped bottles are ugly, per se, they don't do anything for me apart from functionally (baby Baileys bottles, excellent teaspoon rest next to the kettle!) - but I've got a nice stash of Harveys Bristol cream blue now, to do something with :-)