You guys should make an app, it'd be easier, and maybe a chat or message box. Just some suggestions, not to be rude. I love your work, and am wondering if any of you could train/teach me in the realm of the dark arts?
I am going to give a follow up with the accurate information Lark gave... The new website layout is great and the chatter works with the new layout on mobile devices (assuming cause you want an app). All you have to do is go to the homepage, click HOME [with the three lines on the right] & a list of options will appear, clickLIVE CHAT, then click "Launch Chatter" if you have agreed to the rules. It is a bit of a lengthy process but you can always bookmark the link on your mobile device.
As for your question... Look, study, experience, and learn. You can ask questions on the forums and find many helpful links on the World Wide Web. Just make sure you have an idea of where you want to start.