Updated post for intrepid here
Here is a quick way to add the winehq repository so you dont need to wait for the ubuntu community to add the latest wine.
Open up a terminal Applications->Accessories->Terminal
Now copy/paste these commands:
Adding the gpg apt key:
wget -q http://wine.budgetdedicated.com/apt/387EE263.gpg -O- | sudo apt-key add -
Lets add the Repository via wget:
sudo wget http://wine.budgetdedicated.com/apt/sources.list.d/hardy.list -O /etc/apt/sources.list.d/winehq.list
Now lets update our apt sources and install the latest wine!
sudo apt-get update ; sudo apt-get install wine
Ok now you will always have the latest wine package installed!