More Storage Networking trends

So we discussed global namespace and the different ways in which we can implement it. What other trends are there in the storage networking world?

I'm going to take a stab here:
1. Backup: Everybody hates it, but you gotta have it. Disk capacities have grown exponentially, but tape speeds haven't kept pace. So how do you backup your 20TB data center without bringing the production network down, or spending tons of money on some super-expensive solution?
2. Disaster Recovery: Given the times we live in, its a big deal. DR is not just about a DC going away, but its about individual filers going down as well. How do you drive down DR costs? While making sure that the DR site comes back up within a reasonable amount of time?
3. Data proliferation: We stash ridiculous amounts of data on our disk drives. How does the person in IT sort out the junk from the useful stuff? OTOH, given the low cost of storage, is this even a problem for IT?
4. Server proliferation: Walk into any data center today (mid-size onwards) and there are literally hundreds of servers and devices. This is getting out of control. Talk with any data center facilities manager and they will tell you EDC power consumption is going through the roof. I don't think our state's grid can handle it. We've heard of 365 Main's power outage, when both utility power and backup power failed. VMWare/Xen are one solution, but I think more needs to be done.