[eluser]WanWizard[/eluser]
The implications are that I will probably (for the forseeable future) try to find time to maintain the current version of Datamapper (as in: fix serious bugs), but that you should not expect any new functionality or new versions from me anymore.
Datamapper is old code (5 years +), and would really need a full rewrite. It is also fully integrated in CI at the moment, and the way the current CI development is going, that is going to be tough or impossible.
I am the current project lead for FuelPHP, and I'm amongst other things responsible for it's ORM, which is vastly superior to Datamapper. The next version will be framework agnostic, so it could be easily adapted to work with CI as well.
This is the CI forum, so I'm not going to do any suggestions regarding other frameworks. We (our company) had our reasons to dump CI as framework of preference. These reasons may not be relevant for you.