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.
ReSharper 2.0.3 (Changes)
ReSharper UnitRun 1.0 — Build 1
ReSharper UnitRun 1.0 is released. Please download the released bits here