There are some - but they are far and few between.
To cut try to match the MS bundle I recommend:
a) try using redhat or another linux vendor (remove os and file server costs)
b) Search around for older IBM servers - they used to bundle the server license with the hardware
Domino is far too complex for most small companies to self manage (that said so is exchange 2000) - but perfect for outsourcing.
Anthony
http://xminc.com