I asked this elsewhere and got no response, with more and more of my merchants offering XML feeds, it's more than time I jumped in.

Can someone point me in the direction of a resource to help me get started on this? I use FP and have a 7 second memory for html - I can do it, but seem to have to learn it anew every time. I will be able to do it if I tell myself I will though, but where to start.....?

Any suggestions? I'm not asking for hand-holding, just a recommended book or other resource that you've found worked well.