The URL problem -- probably something in the conversion to english, if not typed by hand, might be getting in and interfering with your original attempt to post. Usually when that happens, you can just paste your text into NotePad or any strictly speaking TEXT editor and then re-select all, re-copy, and *then* paste into the editor interface here at SatGuys.
As to "SlingCatcher" .. that's a SlingBox technology ... which one would have presumed they would have ported to Sling Adapter use quite easily ... however here we are 8 (?) months from Scott's having seen the box at one of the trades? And that's what.. more than 2 years after the initial concept/announcement?
insert Prince Humperdink saying "Soon my dulcet darling" ... all the while knowing he plans to kill us after the "party". As too, Dish, which leads with the marketing department and back-fills the spiel with 'tech failures', not of the works/doesn't dichotomy, but anything along the lines of too little, too late, too difficult to implement, .. etc ..
Are there better concepts out there? sure.. a HTPC - "Home Theater PC", something that potentially runs windows or Mac as an 'aside', so that you can install the web sling players, and be able to full-screen the playback, they do pretty well if you have the bandwidth and processing power to handle it. (I say as an "aside" because many of the HTPC boxes run some linux/*nix variant but could also run windows, and you'd just reboot to switch between OS's.. etc..)
** And the EDIT ** since I had started this before you pasted a picture of your text ...
Along the HTPC lines ... you would then use
http://Watch.SlingBox.Com with a web app running on the HTPC to display on your big screen. If you still have pixelation, and you are running in "better" mode of the web app, then your pixelation may be from the speeds of your connection.