I actually picked one up yesterday from my lfs. I've been desperately searching for a gulper, but when I saw this little sausage link I couldn't help myself. He's only about 4" long right now, and I have him in my 90 gallon. I need to get him some more hiding spots, because right now he's curled up behind my sponge filter.
I also bought a pike cichlid at the same time. The pike is only about 3" long, but he's a voracious little guy. I'm HOPING that these two will happily grow larger together, but time will tell.
As for the electric cats attitude, He accepted a piece of raw shrimp from my hand the same day I added him to the tank. He's not thrilled with his lack of hiding places, but he's still a greedy catfish. I think he will prove to be an interesting fishy companion.