The idea is "to follow a trend", to take advantage of medium, Even "tag along"

*Si se han subido al carro de la subida de precios del petroleo

*Numerosos medios y periodistas se han subido al carro de los blogs.

*Sigma ya se ha subido al carro con sus HSM

Your sentence

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Note added at 19 mins (2008-10-03 01:12:39 GMT)
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Chose the idiom depending of the target language public.

Hello Kate.
It is similar to your saying and it is what I know as the usual (standard) translation( maybe old fashioned), so I would go for it, yet, I quite like "Scott Alexander's" option.:)

London's ICA jumped on the wagon and hosted a mini-festival showcasing the latest offerings from the largest Latin American country (and fifth largest country in the world). New York has also been seduced by the drumming up of the Brazilian hype and a programme starts on 9 November at the Symphony Space Leonard Nimoy Thalia.
http://www.kamera.co.uk/features/brazilian_cinema_at_the_ica...

What is EkaluvUdu about?
It is a very good point that KRK came up with. More than the point, it is the narration style of the director that I liked the most. When KRK came to me with this concept about 3 years ago. Then we narrated the story to Medikonda Muralikrishna and he jumped on the wagon. This is a full length commercial entertainer.
http://totaltollywood.com/interviews/Interview-with-Udaykira...

Hope it helps, A.

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Note added at 6 hrs (2008-10-03 07:46:51 GMT)
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I should have separated and edited my comments a bit, sorry it's such a long read