IconRotator will rotate your icons when you rotate your phone horizontally or vertically. The utility does not change the orientation of swipe between work screens.
It is noteworthy that IconRotator you can download absolutely free of charge from the repository http://rpetri.ch/repo/ in Cydia.
This Jailbreak tweak work perfectly, and you can see the Test drive video from iDB:
Does your iPhone looks cool with or without this jailbreak tweak ? Do you like IconRotator ?