[img src="http://www.programmableweb.com/images/title_title.png" caption="" credit="" alt=""]
ProgrammableWeb, a great source of information on APIs and Web 2.0, now includes a mashup matrix. This is brilliant - it lets us see which mashups haven't been tried yet and imagine how they might turn out. What would eBay+Backpack look like? How about smugmug+del.icio.us? Or maybe Google Maps+Upcoming is more your thing?