Thank you for the valuable feedback so far...
If you could make this a script able to allow me to put it on my forum post or a website, allowing me to add +$x.xx over spot and update my silver prices live that would be amazing and quite popular.
Right now this is a PHP script that pulls values and then prints back the results. Adding functionality for increasing values for a % or fixed amount could be added fairly easily.
I have it working within Wordpress as a function and it displays the information in posts via shortcode. Making it work with various forums would be more labour intensive so that may not be a priority but adding general features and having it work in WP will. Being able to work with PHP makes working with this script straightforward.
Request: log all prices. This way, buyer and seller can agree to a price in the future. As it is now, I send a PM to buyer "3.00 btc for oz of silver", and he now has extra value from waiting. If btc/usd price falls, he accepts, but if it rises, he declines.
But "I'll pay you the price at 11:00pm tonight as posted on boollion.com" takes this away, and is fair. Should lead to more transactions.
The script currently caches the values it retrieves on the hourly updates to keep the external requests limited. It should be fairy easy to implement a way to display previously cached values. More transactions are good for everyone
Again the helpful feedback is greatly appreciated, keep 'em coming.
I will be sure to post info about the next update which should be fairly soon