Question : Publishing Applications - Windows Server 2008

I am new to Windows Server 2008.  I need to publish an application needs to be accessible from the internet.  The application is a windows based application.  How can I set this up?

From what I have seen, it looks like TS RemoteApp is the way to go? How can I configure this to access it over the web?

Also, will I be able to access my published apps from a Mac or Linux machine?

Answer : Publishing Applications - Windows Server 2008

Here is a guide for setting up remote app:
http://technet.microsoft.com/en-us/library/cc730673(WS.10).aspx

As for Mac and linux.
Not to sure but you can for sure setup a remote connection into the RDP server.  Just download the apps.
Linux: http://www.rdesktop.org/
Mac: http://www.microsoft.com/mac/products/remote-desktop/default.mspx