The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From TELETASK home automation:
Remark: this version of TELETASK iSGUI is only for iPhone 3G and iPod touch 2nd generation devices. For newer devices see TELETASK iSGUI V2Whether you are at home, around the corner or anywhere on the globe, you can get in touch with your TELETASK home automation system in your house or apartment and instantly monitor and control any device from your iPhone or iPod touch. All you need is your iPhone or iPod touch and a data connection (Wi-Fi, GPRS, Edge, 3G,...).Left the door keys inside? Want to take a look on the drive way camera from your office? Open the door for the cleaning lady when she arrives at your home?No more doubts about leaving your house insecure, you can check and control it by the screen of your iPhone or iPod touch.