From this page you can download the ReSharper EAP builds. If you are looking for the latest released version, visit ReSharper download page.
- for Visual Studio 2003: ReSharper2.0-VS2003-build263.exe
- for Visual Studio 2005: ReSharper2.0-VS2005-build263.exe
If you experience problems with ReSharper after installation, try looking at Installation Problems Workaround
You can also download the latest build of ReSharper 1.5 (RC for ReSharper 1.5.2) at ReSharper165.exe