I've got a Canon Powershot S1 IS. I've been looking to buy some lenses/filters to give myself some flexibility with my photos. Ideally I'd like to buy a kit with everything, but if that's not possible I'll buy all the bits separatley. But I am quite an amateur (An amateur, amateur if you will!) so It'd be great if someone could pass on their knowledge or perhaps direct me to a thread where this has been discussed before.
What I'm basically looking for is all the basics. I don't want anthing to high-end or complicated, just a set of lenses that I can use to take good outdoor/landscape photos. Some portraits too.
By the way, my budget is about $100. Ideally I'd like to be able to use the same lenses for my next camera, even if that means it has to be and S2 IS.