Just wanted to share some links. I am sure many of you already know about this, but I was trying to setup a free SIP based land line no's. (Skype and many other services give it for money)
http://sipgate.co.uk - for UK or Germany's land line no's
a combo of http://www.freeworlddialup.com/ - for SIP forwarding
& http://www.ipkall.com/ - for US land line no
for sipgate there is already a pre-configured X-lite(software for voip calls) available, for IPkall you need to download "X-Lite" and do the setting as mentioned on their website.
both of these work nicely, and people can call from Ufone-Pakistan for Rs.1 or something. Its quiet useful.