Sometime this summer, London will have a cable car system running across the river. This terminus runs from the Victoria Docks (about a five minute stroll from the Royal Victoria DLR station, more like a 15-20 minute stroll from ExCel) to the south side of the river.
The terminals will be the first stations on the TfL map which are commercially sponsored: this one will be "Emirates Royal Docks", connecting to the O2 on the Greenwich peninsula. There's no current promise that it'll be ready for the Olympics, only "this summer".
I was particularly impressed by the pylons over the Thames. Of course major ships must sail underneath the wires - but I hadn't *really* thought about the consequences of that in terms of their sheer height.