I have never had a problem making my real contact info available for whois searches. Since my office is at home I have lately been thinking about changing my physical address with a P.O. Box. Is this an acceptable practice? What about the phone number - is providing one mandatory? The ICANN website lists all these as requirements (address, phone, etc). However, it's not clear to me if failing to provide one detail (such as phone #) is a violation of their policy and if so what the consequences could be.
Depending who you bought your domain name from, it might even be worth paying a little more for a type of private registration to keep your real contact information confidential.
That way you can put your real info up without having to sacrifice privacy or potential loss opportunities say an investor is interested in contacting you (if your contact info is not visible on your site mentioned by HuskyPup).
I don't like the idea of using private registration. My home address is all I want to hide - I always use a working email address for my whois info. Also, the registrar has all my real info - this is separate from Whois.