If you are a user of Google Docs you will be pleased to know that Google has now added support for both RAR and ZIP files. The new compression support now enables you to receive RAR and ZIP files in to your Gmail account and view the contents within your browser without the need to completely download the files to your desktop, laptop, smartphone or tablet device.
ZIP and RAR archives that are embedded inside other archives also work. For example, if you have a RAR file inside a ZIP file so you can just click on that file to access the embedded archive.
For more information jump over to the Google Blog post covering the newly added support.