Trying to do Developer RSS feed

I have been trying for two days to do an RSS feed for eBay. Not the easy one they give you, but I think you have to addMultiItems from shopping api then feed the itemids to Finding api.

If you know how to do this please IM me.

Thanks

What do you want the feed to have? What kind of information, and will it be a search term or will it be a username/shop?