Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of Wine, please access the wine tag and open the latest article (the one on top).

The latest installation instructions for Wine
Hello Linux Geeksters. As you may know, Wine is a popular software, for installing Windows programs on Linux systems. The latest version available is Wine 1.7.3, which has been released yesterday, bringing new features and many bugfixes. Among others, a new Gecko engine, based on Firefox 24 has been introduced and support for both Direct3D and IPHLPAPI functions on Android have been added.
Also, the following Windows games got better compatibility with Wine 1.7.3: Resident Evil 5, League of Legends, Falcon 4.0 Allied Force, World of Warcraft, Star Wars: The Old Republic, and NCsoft’s Aion (MMORPG). For more information, see the changelog.
In this article I will show you how to install Wine 1.7.3 on Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 15 Olivia, Linux Mint 14 Nadia, Linux Mint 13 Maya, Elementary OS 0.2 Luna and Pear OS 8.
Wine 1.7.3 will be added soon in the Ubuntu Wine PPA, so installing it on Ubuntu, Linux Mint, Elementary OS and Pear OS is easy. All you have to do is add the ppa, update the local repository index and install the wine1.7 and winetricks packages. Like this:
$ sudo add-apt-repository ppa:ubuntu-wine/ppa
$ sudo apt-get update
$ sudo apt-get install wine1.7 winetricks