Like saving money? Then it's probably best not to download the new Steam app for iOS and Android, which lets you not only chat with Steam friends, read the latest gaming news and browse groups and profiles, but will keep you informed on those awesome Steam sales.
The app is available now for iOS and Android users, even though the service itself is still in closed beta. Valve claims that it will add people who log in to their Steam account from the app regularly, so if you're looking for a way to spend money from your phone, this is it.
It just goes to show how important the mobile experience is becoming for all types of communities. Now if you'll excuse me, I have some money to try not to spend...