To re-enforce my thesis that web “value chain is lengthening”, check out the lastest move by Meebo.  It’s a tell-tale sign of industry maturation and specialization, as products are more and more like assemblies of features developed by different parties.  Don’t immediately confuse this with the “loosely connected parts” theory though…that implies a world of data portability.  These are tightly coupled bundles branded under a single name that deliver an easily managed product experience.