After getting rid of the 'Status' column it looks like this:

More ideas:
- I've always wondered why Bitcoin has separate Credit and Debit columns. Why not one "amount" column? Is this really more clear?
- Description is now one blob of text. In general it could be split up into "Type" and "Address".
- Add connection status icon to status bar ("disconnected" for 0 connections, "connected" for 1+ connection, "good" for 5+ connections)