Long ago I heard a sage piece of advice, don't buy on buy out rumors. The Berkshire rumor started awhile back was something like an accounting change for the pension plan, nothing to do with setting up for a buy out. Buffett always buys at a good price, with gas/electric utes at near all time highs he probably will wait.
That interest started about a year ago and nothing came of it but who knows. Buffett bought Mid America Energy a few years ago for cash. I hope he stays away from LNT because I don't want to lose that dividend. I also am not interested in paying a huge tax on the gain if Buffett buys with cash.