Those apps are not from Samsung but are maintained by Netflix and others. It's a shame Netflix and other companies bail on this.
I bought Samsung LN40B750 TV, in Feb 2010, it was supposed to be a decent TV with Internet and All promising upgrade as well, and now I discovered that just 1 year old model does not work with the 2010 apps, they change the whole core technology (Widgets to Apps) - you do not see any new widget for months, at ever comes across is crap.... For example you cannot install Netflix in a year old model, I phone remote does not work etc. there are no firmware upgrades either. Customer rep was more interested to see the new Blue ray player to me got get such feature. Buyer beware, Samsung purchase will give you frustration. Its engineer does not design with future in mind, so 2010 model will be obsolete in 2011. Firmware upgrade etc or any upgrade is illusion they build for marketing.