>These things are absolutely ubiquitous in any major city, US or Europe, right now.
Ubiquitous is doing a lot of work there. In the Northeast US, I've probably seen an increase in bikes given some dedicated bike lanes but I rarely see anything else.
This is something like seems to vary a lot. Depends of course on whether rentals are available. I rarely see them in Cambridge. But while they were quite popular when they first came out in Raleigh--and I believe rentals are still available--you didn't see them much last time I was there.
