These are some enhancements I use for Flowdock. They make it look more like a popular chat client, which really helps in readability.
It will do the following:
* Always display the message time * Show a user's avatar next to her message
See the screenshot for an example.
You can have it as a Fluid.app user script, or as a bookmarklet. For the bookmarklet, see:
Fluid App User Script