Back when I had my forum site, Digital Dementia, the first host I used because it had a free database was lycos.fr. Back then, it had one of those retracting ads, which was annoying in itself but you had to expect because it is a free site and they have to pay for the cost of giving that much space away through advertising.

However, here are some resources that may help you in finding a new host for free:

http://www.free-php-hosting.com/index.htm
http://www.freewebspace.net/php/sear...&submit=Search
http://www.free-php-web-hosting.com/
http://www.freewebspacereview.net/se...?php=on&page=1