As part of one of those "45 hardware startups" (in stealth mode) trying to tackle the problem, I think nevertheless there is plenty of fat to trim just on the software side still... I mean, just look at that very page: 200 MB [edit: in memory consumption] for a single static article!

Information-theorically at least, I bet that is another 10-100x speedup opportunity right there (and next multi-billion dollar industry, perhaps)...