There's something of an online lovefest underway for Chris Pirillo's newly launched metasearch site, gada.be (pronounced "gotta be", I believe). Since I can't find anyone else mentioning this, I'll blow my own horn. Unless things have changed since late last month, CaRP is the RSS processing engine under the hood. It's one of the most interesting, and certainly the highest profile use of CaRP that I'm aware of.