Web 2.0 workgroup posts, mashed up via OPML and Yahoo search API--worth a look at how it selects out *top* posts. (Via Crunchnotes)
J Wynia: OPML Sampling, Building a page showing the best item from each RSS feed. How he did it.
Marc C: Check out Restaurant reviews with Yahoo maps, a sweet little toy.
Via we make money not art: Zapped!/Preemptive Media mapped the results of their investigation about RFID use in Tokyo. Neat-o.

Via Programmable web: " Auction Mapper is an interesting little application built on the eBay API that gives fast Flash-based search results on a map (and not Google or other public API map)."