OpenDNS... How far can specialization go?

Two days now with OpenDNS, it's impressively fast and reliable. Now i won't be wondering why www.vmware.com or www.google.com isn't available sometimes. Shame on ISPs. It's funny, by having lousy DNS servers they are simply opening business for others. When I was first aware of dyndns and no-ip I was amazed how are they making money out of this (not charging for what any ISP do charge for). I know premium services do exist...yet to have my m\c uniquely referenceable costs extra money and they don't charge me for it.
I believe in specialization. Yet, to build your system as a stack of extremely (individually) reliable services is not reliable. it's an additive contribution to the overall risk and a costly involvement.
I wonder what entrepreneurs will come up with...NEW TTL Value setter?! HTTP DELETE responder?!