We all know what "LOL" means. The ubiquitous acronym for "laughing out loud," it's likely you use it at least once a week while conversing online with friends, relatives or coworkers. But how often have you used the acronym while   really  laughing out loud?  It's a safe bet that you've done this only a couple of times, if ever. What's more,  I wouldn't be surprised if some of us have typed and sent people an LOL with a straight face. In truth, it might be better to put LIS -- laughing inside -- rather than LOL, because the former is what we actually do. Or, how about ILT, which could stand for I like that. LOL is what we employ to indicate that something the other person tells us is amusing in some way. You may actually let out a small chuckle, but really: How often do you hear people laughing aloud, let alone when chatting with someone online? Maybe we just haven't come up with the right acronym that captures feeling amused. A Faceb...