Funny you mentioning this because my hiatus from this thread (I'm sure for some that was a good thing ), was because of a new project where I'm converting my theater URC hard button remote to an iPad app from iRule (not for the faint of heart on the learning curve scale though because you need a fairly good sense of application logic... and a background in Photoshop cetainly helps too!).
I am now all but done and thanks to Gary's well written doc on IP/RS232 I was able to get full IP control over the RS55 going and it is a thing of beauty (allbeit a bit cludgy because it shuts down the IP connection every 5 seconds without a keep alive command)! The best feature to this application for this PJ and my other IP devices (DirecTV HR24, Tivo, but especially my Denon 5308ci!), is the ability to send the direct Hex commands from one button! For instance I have the lens shifts I saved into aspect ratio buttons so one simple push and I have a quick masking of the movie (well that and when I get off my ars and pull down my shade from the top... yeah... poor mans masking system as I'm one of the few here that don't believe in a ani-lens!). It even has direct Hex commands for the aspect ratio lens as well as direct feedback of input and surround modes on the screen!
I'll be making more additions as time goes on (like for direct gamma control etc...), but for now I'm happy to get this going in something other than straight IR (NO MORE WORRY about the room being flooded with IR because the iPad sends ALL the commands over your home WiFi to a Global Cache device hooked up to your router in the theater!).
For anyone looking for this type approach and who has an iPad (or Android device!), I highly recommend this application as the support provided by iRule is second to none (not too shabby for $50 . . . ($100 for the Pro version)).
Here's a few of my screenshots to give you a sense of the app . . . (BTW ... the cool factor on this is off the hook! especially now that I bought a stand for it called "the Perch" which looks fantastic by my HT chairs!)