I too read all the reviews about the samsung internet dongle and people not being able to use it but still decided to buy it at the same time as my samsung LED telly from amazon and it's amazing.
I struggled with the wireless code for about 20 minutes until I realised I'd not changed the letters i was imputting from caps to non-caps and the bt hub password I was imputing was in upper case BUT I was entering my bt home hub password in lower case. you change the case using the red, green, yellow, blue buttons on the remote like you would use to control the remote. The reviewer saying it doesn't have numbers to enter is wrong, it clearly says in the set up that you use the remote to add in numbers 0-9 and the left right buttons to select the letters. (p.s. password can be found on the back of your bt home hub or your router password if you have set one). Also as you are doing the set up don't touch the volume or the channels or anything like that as you may need to start the process again. When I made an error I just pulled out the dongle. and put it back again and started from the beginning.
If I did all the above first time around I would have been set up in 2 minutes.
Then once I was synced with my home hub I updated the internet services to download all the apps to the TV's memory. This took about an hour to download so don't do this if you are wanting to watch tv or a film immediately, BUT once this had happened i was then able to get bbc iplayer, daily motion videos, youtube clips, and stream films from love film. It also had google maps and facebook and twitter. A photo manager, some more games, weather applications, a history channel app with what happened this day in history.
It's amazing. I just watched an iplayer episode of a BBC comedy show in great quality streamed to my tv with no pc involved. The quality of the ipayer on a 40" screen i thought would be not that great but it seems to upscale. much much much better than lap top viewing. The Love film app means you can pay £ a month and stream the love film offers. no more trips to the video shop.
Its the future and don't be put off by the other reviewers not really knowing how to set it up, I am glad I ignored those, as its total genius once its running.