A user on the Symbian-Freak forum has started the long requested work of developing a share online plugin for Facebook.
This is what he has posted in this topic - http://www.symbian-freak.com/f
Although i don't use facebook for pics, but have seen quite a few users request for this plugin. Help him develop and improve it, you shall be the one using it.
On a side note, you can publish your pics to Facebook via Share Online using the PixelPipe plugin.