The babà turned out perfectly. It rose above the bundt pan (not the traditional mold, but one does make do), kept its height in the oven, and sucked up all the rum syrup (which we, in turn, sucked down). I would have liked a bit more syrup. Next time.
Since we ate the whole thing before taking a picture, I'll let you enjoy Frank Sinatra and Bing Crosby singing 'Well, Did You Evah!' from the 1956 movie 'High Society' instead. My father commented that he always hears the phrase baba au rhum as sung by Frank Sinatra (at 2:03 in this video clip). That's my new goal--hearing Frank Sinatra while eating Babà, baba au rhum, or plain old rum baba a few times a year. It's good to have goals.