Cute design ideas still require some semblence of competent execution. The "lines" are completely random. Of course they're going to be arbitrary, but at least try to be thematic about it.

It's missing the AbeBooks acquisition, which is a hell of a lot more relevant than most of the stuff that's on here.

Investments are not acquisitions. Amazon had a significant investment in BillMeLater, but eBay still was able to acquire it. Oh, they missed that one too.

Agreed. This is a singularly bad design.

They invested in Delicious too, but probably too small to show on this chart.

Sure, basing the lines on the year of purchase is a bit random. Their one on eBay is much better:

http://www.meettheboss.com/ebay-acquisitions-and-investments...

Looks incomplete. I used to work for Amie Street, a startup whose series A was financed by Amazon... and it doesn't show up on the map.