I am using the default theme, and use the following to customize the footline,
\useoutertheme{infolines}
\setbeamertemplate{footline}{\hspace*{.5cm}\scriptsize{\insertshorttitle
\hspace*{50pt} \hfill\insertframenumber\hspace*{.5cm}}\\
\vspace{9pt}}
I don't like it also appears on the title page. Is there a simple way not to show it on the first page?