I consider myself fairly experienced with Macs but when it comes to playing around with partitions (aside from Boot Camp) I'm not very knowledgeable. I made a 45GB partition for the Developer Build of Lion and find that it's never being used and would like to erase and merge it back with 10.6.7 so that the space its taken up is available. Is there any way to do this without having to erase the entire drive? Every time I attempt it in Disk Utility it says the drive cannot be ejected (probably because it's the same one that SL is on). Any advice?