Php plus - java script programmer

Hi,

We have a spider that fetches data from a number of sites related to horse racing. This works but; we need to enhance this to increase both the speed and quality of spidering.

To detect changes to the format of the sites being spidered.

Develop a web interactive means of defining which parts of a page are to be spidered, to allow more sources to be spidered easily.
Handle errors better

Spider a number of urls concurrently

Skills required are : PHP, preferably using the simpledom project http://sourceforge.net/projects/simplehtmldom/, javascript with good query knowledge.

Please further note: we will accept the above "task" to be carried out only from an individual, and not any companies...
Target cost per hour : $5 - $10