Kinda. Here's a screen cap of what i mean.
The bottom 3 lines are the 3 most recent lines in the channel. Looking at the vertical scroll bar, the 4th line from the bottom and above are from earlier conversation in the chat buffer.
Perhaps a background color can be given to the new lower portion of the chat buffer while scrolled up, to indicate separation between the two and as a reminder that you're looking at old text.
