Hi Peter, I would like to add some examples:

Perhaps one of the best known examples of "Rumba flamenca" (alson known as "Gipsy rumba" or "Spanish rumba") comes from the grat Paco de Lucía, in his classic song "Entre dos Aguas", an early exponent of "Flamenco fusion" in the 70s:
https://www.youtube.com/watch?v=2oyhlad64-s


Here's another example, with more modern arrangments (the bass part deserves attention)
https://www.youtube.com/watch?v=q3BXTXbZfBs


These are, of course, rather complex examples; the basic guitar technique (what I would really love to have in Realtracks format) can be clearly appreciated in this instructional video (from 2:08)
https://www.youtube.com/watch?v=fRLa1Y7oKmQ


The french group Gipsy Kings popularized a simpler version of this guitar style, called "Rumba catalana", wich is usually faster and slightly different. The basic guitar pattern is used in a lot of commercial tunes, but within BIAB could be useful for latin, pop, or gipsy jazz tunes as well.
https://www.youtube.com/watch?v=oNgSeJzLJFc


And finally, just out of curiosity, this can be a good example of how could rumba guitar work with other styles and elements, like piano montuno, funky rhtyhm section, or even big band arragments:
https://www.youtube.com/watch?v=lsjx_z7EjBc