Thanks for the feedback.
We do have something similar to the topic pop-up you're referring to, and a way to view unread posts.
For the hover/pup-up, if you were to click on your login name in the upper right corner here:
And then choose yes for the option under 'Site Options' here:
This will allow you to hover over a particular post before selecting it, shown like this:
This should be something along the lines of what you're looking for.
Now, for unread posts, we have a small 'Shortcuts' window located right underneath your login name:
By selecting this, it will pull up all posts unread from newest, to oldest:
In addtion, you can also use the dropdown menus (red box above) to specify a specific forum, and time frame.
Let us know if this helps.
Ooh, what does that button do?