We've made a number of enhancements for Time Slide in OpenSolaris 2009.06.
Under the hood nautilus visualization is now fully multithreaded. This means that you can now browse directories with more than 4000 snapshots without noticeable slowdown (That's more than 3000 years of snapshots if you use the default timeslider snapshot schedule !).
On the visualization side, the interface has been polished and we've added the possibility to manually snapshot a directory (either by right-clicking on a directory and selecting the "snapshot now" menu item or in time slider mode by clicking on the camera icon).

You can also delete snapshots manually while browsing through time by clicking on the delete button.

or by using the delete dialog in the time slider setup dialog (System -> Administration -> time slider setup)

We also added another way to browse a given file history. You can access it by right-clicking on a file and then select the "explore versions" item. If no other versions are available then this item is disabled.
You can then browse the different versions of the selected file.

If you're exploring the history of a text file (be it code and plain text). You can compare visually the difference between the two versions. You just need to select a older version and then click the compare button. If you have meld installed (available from the IPS repo), meld will display the two versions of the file side by side.