Free DID (incoming numbers) from around the world

Now that you have found a free or paid VoIP service, you would like others to be able to phone you from a PSTN or mobile phone. There are a number of companies offering DID or imcoming numbers (VoIP-In) for a flat yearly rate or a monthly fee. But then again there are a few offering free DID numbers from around the world, albeit very limited and only from a few selected countries.
www.ipkall.com - Free Washingtion (206) area code number. Number expires after 3 months if not used
www.globe7.com - Free US phone number
www.enum2go.com - Free eNum number
www.freenumber.nl - Free Dutch number
www.esms.com - Free UK numbers
www.messagenet.com - Free Italian numbers from Rome, Milan and Turin
www.stanaphone.com - Free US number (New York)
www.skypho.com - Free Italian number, but you have to use their service
www.sipnumber.com - Free US phone number
www.voipuser.org - Free UK number
www.voicestick.com - Free US or UK incoming number - only to be used with their service
www.sipgate.com - Free UK number, but you have to live in the UK and use the Sipgate service
www.sigate.de - Free German VoIP-In number, however you have to reside in the same area code (German Law)
www.privatephone.com - Free US phone number and voicemail
www.talkdigits.com - Free US phone number
www.clickdigits.com - Free US phone number
www.orbtalk.co.uk - Free UK telephone numbers
www.open-telecom.co.uk - Free UK phone numbers
www.woize.com - Free UK number after you have added a small amount to your call account
www.aimphoneline.com - Free US phone number
www.craigsnumber.com - Free temporary telephone number for 1day, 1 week or 1 month - a very nice idea !