It possible to use the msid in the link to a map at maps.google.com, see:

{mosmap msid='108595336348435880749.00044a946bcb3d5f61664'}

JavaScript must be enabled in order for you to use Google Maps.
However, it seems JavaScript is either disabled or not supported by your browser.
To view Google Maps, enable JavaScript by changing your browser options, and then try again.

You can find the MSID at maps.google.com by clicking on link and copy the value of the paramater MSID in the given url.

Also better support for the links generated by maps.google.com:

{mosmap kml='http://maps.google.com/maps?f=d&hl=pt-BR&geocode=
&addr=S%C3%A3o+Paulo,+Brazil
&daddr=-23.074678,-46.358185+to:Joan%C3%B3polis,+Brazil
&mra=dpe&mrcr=0&mrsp=1&sz=10&via=1&sll=-23.21342,-46.45761
&sspn=0.574262,0.85144&ie=UTF8&ll=-23.190863,-46.470795
&spn=1.148712,1.702881&z=9&oe=UTF8&output=kml'}

JavaScript must be enabled in order for you to use Google Maps.
However, it seems JavaScript is either disabled or not supported by your browser.
To view Google Maps, enable JavaScript by changing your browser options, and then try again.