This article contains bugs (i.e. the bitrate is *not* 500 kBit/s, bit timing is much more complicated with CAN; packets can also have 0 byte payload).
Wouldn't it be much better to just refer to http://en.wikipedia.org/wiki/CAN_bus here?
the bean and can bus pages weren't intended as be-all end-all pages for information on these bus, but mainly an introduction and provide references to more detailed information. feel free to update any information you'd like on the pages. my personal experience with wikipedia is that it is a good source of information but tends to be lacking on specific technical aspects, in this instance as to how it relates to embedded linux development which the elinux.org wiki aims to address.