Corporate server managers everywhere were given a jolt this week when rumors emerged that RIM might implement a hard cutoff for BlackBerry Enterprise Server 10: any devices based on BlackBerry 7 and earlier might not connect at all, leaving IT leads with the uncomfortable choice of either running a BlackBerry server platform that's supposedly without a future (BES 5) or having to upgrade both the servers and phones all at once. RIM is putting minds at ease -- more or less. The company's Kim Geiger has confirmed in a statement to the media that BES 10 will support legacy