More downsides to jailbreaking!
What became evident to me when I did a test Jailbreak on my iTouch, was that suddenly you no longer have a trusted source. Yes, you have a TON more options to play with and a whole host more apps, but the whole vetting process is lost.
You have NO idea whether what you are installing isn't malware, or contains malware.
Proceed at own risk I suppose, but it sure made me reconsider and I switched back.