Although, as a sibling comment points out, that article is very old, I can attest to its continuing general accuracy, having interviewed there last year.
Although I didn't get a look at their financials, my overall impression is that they can't afford anything as extravagant as geographic distribution, absent a huge corporate sponsor or two.
Even a modest increase in donation revenue would be unlikely to make a difference, as the other impression I had was that spending in that area was far from a priority, especially compared with data acquisition/conversion projects.
I think it's great that the IA is attempting to be a broad, general-interest digital library, since nobody else is doing that.
However, I also wish for a separate archive focused specifically on The Web. Besides not being subject to distractions or competing interests, I speculate that it would be more attractive for web-dependent companies, such as Google or CDNs, to donate to.
