A link to (what appears to be a German site) Spielbox (as translated by Patrick Korner) had some additional info:
Now Ravensburger (aleas parent company) has given word that the new rights-holder is none other than Microsoft, which means that Puerto Rico is in line to be released as an online game, likely via Microsofts X-Box Live.... Ravensburger went on to say that similar agreements were inked for other game titles, including The Princes of Florence.
Whether these games make it to XBLA, or even to the U.S. market remains to be seen.
Thanks to XbA member allezpsg for the tip.