havent used WalkingHotpsot but i did go thru the motions of trying JoikuSpot.
You'lll have to buy the premium version as the Light (free) one is not Samsung signed. The software will install and it will allow devices to connect to it as a Hotspot but it want let that device get access to the internet via the packet data connection (3G/Edge/GPRS)
i e-mailed the support people who sent me a two day free trial of the premium version and that worked a treat with my netbook. I then found a guide to connect the netbook via bluetooth and didnt need the JoikuSpot!