I have just received my Screenplay DX and have had a chance to play with it a little.
The interface is quite nice compared to Iomega's previous incarnation of this player (the Screenplay Director). Actually it looks similar to the Western Digital TV Live box.
Unlike the Screenplay Director, the DX does not have a torrent client which is a pity.
It does have a web browser though and it is fairly good. The remote control doubles up as a mouse although it's not that easy to move the cursor around. I guess it will take a little getting used to. Not all videos embedded in web pages can be played though.
The DX comes with a wireless adapter as standard. I am however using a wired connection.
All the other functions are ones you'd expect on any media player. It plays all kinds of video formats, it plays photos and music too.
The web applications are few and far between. Other than the actual web browser, you only have Youtube, Mediafly and Picasa.
Transfering files from other computers on the home network is not as easy as it was on the Screenplay Director. You can't see how many files you have selected and what the total size is.
I'll update the review as I get to know the device better...
UPDATE 3 Aug 2011
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The remote is actually quite good. It's fairly small although it does not quite fit in one hand. It is very easy though to operate it with one hand for the usual player functions but two hand are required to type in some text (for searches for instance).
The web browser is Google for Linux with some adaptations for such a media player environment. It works very well and it is easy to see and read the web pages from the couch.
Boot up time from stand-by mode is quick, certainly quicker than that of the Screenplay Director.
In the VIDEO mode, when one parsed through the videos, the device displays a preview of the movie in a small window with sound. The preview shows the duration of the video. This is quite handy to check that a movie is going to play alright.
I found no way to hack into the operating system via telnet or ftp. If the Screenplay Director is anything to go by, one would need to modify some files on the O/S. For this the device needs to be attached to a linux computer via USB. I have not tried any of this yet.
One minor inconvenience is that the device does not detect other computer on the home network if they have been turned on AFTER the DX. Only a reboot will help here.
After a few days' use, I still like this product very much.