By the looks of it there will be a release or 2.7.x.x for the 85x/95x series of Blackberry's but that's about as good as it gets, development has been limited to the older C++ devices since the release of the J2ME/Java Blackberry's, by the looks of it the Mobitex/DataTAC Blackberry 5790 will come to market for user that require 2Way messaging and paging but with the added Java platform. As for the 5810/5820 I don't think there's enough flash memory on those units to run OS 4.0? If you're looking for a OS 4.0 capable device your most likely going to have to upgrade.
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