Ughhhhhhhh I left my phone at home today and my friend from SF is coming into town. I told her to call me when she got here.
Here's what I have done: sent an email to a common friend, sent a FB message to her sister. Sadly I don't know anybody's phone number. This is pathetic.
Maybe you should sign up for a google voice account so you can give out that number and then if you leave your phone at home you can set google voice to ring your work number instead. Of course, that won't help you now though.