I just hit my first real snag with this widget.  I realized that to make it useful you have to let users add a bunch of products, wishlists, categories and merge all those feeds into one unified output.  I have everything working nicely for one feed, but dealing with mulitple feeds is a bit more of an issue.  I’ll have to keep track of which items within the feeds have been displayed already.  Plus, I’ll as new entries are found I’ll have to slide down the old entries, rather than just refreshing the whole list, as I would have done with just a single feed.

Essentially I’m writing a pretty full fledged widget RSS aggregator.

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