As quoted from techtree, Thursday (8/4/2010), Nokia is also updating S60 3.1 in the second E-series phones. Previous users should update their first Symbian OS to support the installation of version 3 Maps OVI.
OVI Map To get the latest version for the E71 and E66, users simply visit the site maps.nokia.com, then install it. It is easy, either through a PC or directly from the handset.
Here is the complete list of Nokia handsets, which are able to enjoy free navigation service: Nokia X6, Nokia N97, Nokia N97 mini, the Nokia 5800 XpressMusic, Nokia 5800 Navigation Edition, Nokia E72, Nokia E52, Nokia E55, Nokia 5230, Nokia 6710 Navigator, Nokia 6730 classic, Nokia N86 8MP, and the latest Nokia E71 and Nokia E66.