I don't really know if this is the right place to ask these questions, but I would like to clear these up. Ok, so, Ubuntu sounds awesome, but I heard it has Wine on it already? If it does, that's awesome. If not, well, I like Wine. Also, this is basically a version of Linux, correct? I just wanted to know if this stuff is correct or not. Thanks for the help!
Linux is the kernel that Ubuntu and many other operating systems use. Operating systems that use Linux as their kernel and use it with the most common libraries and tools (for example, GNU libc) are called Linux distributions or GNU/Linux distributions.
Confusingly, while Linux is a kernel, the term Linux is also sometimes used to refer to Linux-based operating systems (i.e., "Linux distributions"), or to refer to their shared characteristics that some people consider to comprise an operating system (of which all Linux distributions, also called GNU/Linux distributions, can be considered parallel variations). The term GNU/Linux also refers to this (and is not the name of a kernel).
All the above terms are widely considered correct, though all of them are also considered wrong by a few people here and there. You can read about the naming controversies if you like. During the ordinary course or using and talking about operating systems and kernels, they usually don't get in the way too much and most of the time terms are widely understood however they are used, from context.
As you may be aware, Wine is an emulation layer that provides an infrastructure running Windows programs. Many Windows programs run well on Wine, but also plenty run poorly or not at all. Wine runs on a wider variety of platforms than "Linux" systems. It runs on GNU/Linux distributions like Ubuntu, but also on other Unix-like systems, such as FreeBSD and Mac OS X.
Ubuntu does not come with Wine installed by default, but you can install it easily. Wine is officially packaged for Ubuntu and Wine in Ubuntu is maintained officially by the Ubuntu community (it is provided through Ubuntu's official software sources). Just open the Software Center, type in Wine, and install it when given the option to do so.
Wine is provided by the wine package. You can also install it by running:
If you want to install the latest version of wine, see these instructions and/or this question. The Wine PPA should be pretty safe but it's a good idea to read these guidelines before using it or any other PPAs.