I am limiting my job search to a reasonable work week, but with e-mail, voice mail, and my cell phone, i find i am never off duty. Managing your own access is a tricky business. You want the marketplace to feel you are responsive, yet you don't want to be caught off guard.
Effective communication does provide a competitive edge, but it is necessary to set limits.
Record a new greeting every day that alerts callers when you will be in the office and when you expect to be returning calls. I will be in meetings most of the day but will pick up messages at noon and four. Leave such a vague greeting that no return expectations are created. You have reached my message mailbox. Your call is important to me, so please leave the time and date of your call.