DSC has released it's April Fool's DLS IV today. I downloaded and did some light programming of my 1864 earlier. I haven't had a chance to fully evaluate it yet but so far it looks nice.
The installer is cake. I does require SQL Express and some other Microsoft components. If you are running any version of SQL Express I would use caution to avoid over writing your databases.
I have not installed it on a machine currently running DLS 2002 but I don't think they would fight since the program appears to have been completely rewritten. Just don't run them concurrently as they will fight over COM ports.
The layout and ease of use is amazing. Everything is logically split up and it even includes a function where you can search for a field rather than poking around. The interface has a very clean and up-to-date look. It includes a chip flashing utility and other fun toys.
Anyone else play with it yet? Thoughts?