From this page you can download the EAP builds for ReSharper 2.5. If you are looking for the latest released version, visit ReSharper download page.
ReSharper 2.5 (Roadmap)
ReSharper 2.5 is released! You can download the RTM build here.
We are working on ReSharper 2.5.1. You are welcome to try pre-release Nightly builds of ReSharper 2.5.1.
ReSharper 2.0.3 (Changes)
ReSharper UnitRun 1.0 — Build 1
ReSharper UnitRun 1.0 is released. Please download the released bits here