As we reported earlier this month, AT&T has relaxed its policies on 3G access enough that iPhone apps can now hurdle down the data network with impugnity. Case in point: SlingPlayer Mobile for iPhones & iTouches — once limited to Wi-Fi connectivity — can now access your Slingbox SOLO, PRO, or PRO-HD on either 3G or Wi-Fi. (Slingbox Classic's, AV's, and TUNER's may require a hardware upgrade.)
The iTunes listing includes some novel uses for the service (monitoring security cameras, anyone?), as well as an amusing 12+ age rating based on the sort of content you might actually view. (Whatever happened to "don't kill the messenger?")
If's a free upgrade for existing customers, or US$29.95 for first-timers.