Warning this post may contain sales pitch as I am admin of the hosting service.
Grinhost.com offers free webhosting with unlimited mysql databases. This is what grinhost offers
200 Mb of space.
2 GB of traffic permonth.
Free subdomain of your choice.
The CPanel control panel.
No forced advertisements.
Your ads like google adsense are allowed.
Unlimited MySQL databases.
Ok this is sort of a ad as I am the admin there, but I would say that the hosting is pretty fast. We are running our site grinhost.com on the same servers as we give to our users. Continous participation on our forums is a requirement for being hosted with us.