I think the rate at which technology is advancing is phenemonenal! However, it's not safe to assume that everyone with whom you're interacting has all the latest equipment and gadgets. In particular, do not assume that everyone has Caller ID on their phones. I know that all the new home phones are equipped with these displays, but if a homeowner does not opt to pay for that service then phone numbers are not displayed. In our effort to trim our household budget to the barest minimum, we have chosen to not include the extras like Caller ID, call waiting, & 3-way calling. So it's frustrating when people call when we're not home and leave a message on the answering machine but do not leave a call-back number. They'll say something like "just call the number you see on the phone, good-bye!" This is especially upsetting when people call in response to ads I've placed to sell chicks or ducklings. I am sure I've lost a few sales because of this, but still doesn not justify the expense of these phone extras. My kids are the ones who record our outgoing messages, I've told them to include the instruction "Please leave your number, we do not have Caller ID". I hope that our callers will listen & respond. Please remember this when you call and leave messages for people, especially those you do not know. Do you have other examples of how fast-advancing technology has left you frustrated?