To use eBuddy, you will need to register an account; you can do so in-app, or on the . Then add your IM accounts and their login information. You have to do this only once; eBuddy will remember the details.
The eBuddy interface is divided into three tabs: Buddies, Chats, and Accounts. Buddies shows you a list of your chat buddies with their profile pictures, online or offline status, and an icon for which account they belong to. With the Menu key, you can search for buddies, add buddies, and configure notification and other settings.
The Chats tab provides a list of open chats. Each chat in the list shows the buddy and account. Click the chat to open its window and continue the conversation. The compose window includes a basic set of emoticons, and the conversation is threaded with time stamps.
The Accounts tab shows a list of your configured IM accounts. You can add another account through the Menu key.
eBuddy works well for me, with no noticeable latency. It uses data, not SMS, so you can avoid the outrageous text messaging fees that some wireless carriers charge.