fpReport is most likely to be officially released in FPC 3.0.6 or FPC 3.2.0?
I don't know what the FPC team plans. I can say that I developed fpReport with FPC 2.6.4 (and also tested with FPC 3.0.2 at the time) so there is no technical reason why they couldn't release fpReport with something earlier that FPC 3.2.0.
If you don't want to use FPC Trunk (I don't blame anybody if they don't - it can be unstable at times), but do want to use fpReport, then simply copy the report directory from Trunk and use it with FPC 2.6.4 or later. That's what I do. Just make sure you get occasional updates from Trunk, because things are still being improved in fpReport.