In a post to RIM’s official blog, Adrian Stone, director of the company’s BlackBerry Security Incident Response Team (BBSIRT), explains — in painstaking detail — RIM’s position on “jailbreaking,” a procedure some tech-savvy consumers use to extend the functionality of devices whose operating systems are tightly controlled by their manufacturers. Its headline: Don’t do it.

And if you do do it? Well, then, you’re on your own if things go south for you.

“RIM recommends against installing any jailbreaking tool,” Stone wrote. “Customers who use a jailbreaking tool on BlackBerry products void the manufacturer warranty and also increase the long-term risk of negatively impacting the stability and user experience of their BlackBerry products.”

Not a surprising position for RIM to take. Rivals like Apple have had similar policies for years. But then, Apple needed one almost immediately after launching the iPhone in 2007. Evidently, RIM hasn’t until now, when the homebrew community has taken to meddling with the PlayBook via jailbreak tools like Dingleberry. Which is a good sign, I suppose, given the device’s lackluster sales.

Yesterday the creators of the popular ZiPhone jailbreak discovered in the latest test firmware for iPhone developers a reference to Infineon’s (IFX) SGOLD3H chipset–a chipset that supports 3G wireless broadband of up to 7.2 Mbit/s.

Now “industry sources” cited by TG Daily are claiming that the next-gen iPhone that runs on that chip will debut at WWDC. And there’s more. The device will be slimmer than its predecessor (by about 2.5 mm) and it will be offered in least two configurations at current price points: an 8GB version for $399 and a 16GB $499.

According to Engadget, the iPhone Dev Team, an unofficial group of programmers who developed the jailbreaking tools that opened up iPhone 1.0.1, have crafted a second set of tools that exploits a vulnerability in Mobile Safari to open iPhone 1.1.1. They’ve not yet released a general-use version of the tool, but one is surely on the way.

That said, there’s no telling how long it will work once it’s released. As Engadget notes, these newer jailbreaks aren’t nearly as robust as their predecessors. “… Unfortunately, it sounds like most (if not all) of these new hacks rely solely on that single TIFF exploit in Mobile Safari, meaning that everyone’s back to square one the moment Apple beams v1.1.2 to the public at large.”