Before the flood of requests start coming in for a Universal Binary version of BeebEm, can I pre-empt you all and say that there won't be one available in the near future.
I don't have access to an Intel Mac and I cannot justify spending money on a
new iMac Intel Core Duo just to re-compile a piece of software which is given
away for free (unless of course someone wishes to help future development by
donating one 
).
The source of BeebEm is included in the distribution so if you happen to be a bit more affluent than myself and own one of the new beasties, have a go at compiling the code yourself and see if it works.
Feel free to report back your findings as it may help others wanting to try the program on their new Mac's.
Should Apple eventually release an updated Mac Mini with an Intel processor (at a reasonable price !), I will of course get one and create the Universal Binary myself.
Update - 07/04/06
But .... a new toy is coming soon so you may well get a universal binary after all.
Update - 08/04/06
My new 20" iMac 2GHz Intel Core Duo arrived today and BeebEm re-compiled to a universal binary with only a single change which was very surprising.
After I have tested it a bit further to make sure everything is still working, I will make it available for download.
Update - 20/08/06
I have now released BeebEm Ver 3.0t which is a universal binary.