Querypath: PHP node example

I'd like to request a couple of example snippets using PHP in a node, as I think these will demonstrate to others, both the usefulness and power of the module. If so, I'd like to request something along the lines of the following, which extracts a table of data once per day from a website, and converts and displays it, as a list:

• Retrieve a page from a website, eg. US Dollar exchange rates
• Extract the table (ie. using a start string and end string)
• Remove the links
• Convert the table into an unordered list
• Display
• Repeat every 24 hours

Second example

Take RSS field, and produce nodes for each, and update once per day.