Interface Buses

Hi,

Wondering if I could pick the brains of the list.

I have an AVR chip, and I want to interface a number of sensors to it, using
some sort of bus, now the SPI bus springs to mind, but I am not sure if its
possible to have n number of devices connected to it, and to read the data from
each one?

Can anyone advise on how best to do this? I would prefer to use standard buses
where possible.

Thanks

D