How can I find address and contact information about a long lost love
without knowing much more than their name?

Is it a male or a female whom you are seeking?

In which country?

When did you last meet?

I think that researchers are not allowed to post personal information
about living people. But I have seen personal information posted about
public figures (how to contact Bill Clinton) and people that are no
longer with us.

http://answers.google.com/answers/threadview?id=436830

I'd like to more exactly understand the rule on this.

They are certainly allowed to advise you on doing your own research.

Dear jlr, 

Here is a similar question that I have answered: 
<http://answers.google.com/answers/threadview?id=340077> 

If your lost love is in the UK, feel free to use the information posted there.

Try the "missed connections" section of Craig's List
(www.craigslist.org). Make sure that you are in the appropriate city.

if you find her or him let me know as im looking too and would like to
know if it works

Hi lovelorns,
Towards the end of the answer to this question, many sources of
information for finding persons are listed:

http://answers.google.com/answers/threadview?id=529001

Good luck, Myoarin