Feature Request: front-end currency conversion

I'm building a site on my marketpress network for an Australian seller who is also distributing his product in the US and the UK. To make it work, I'm having to build 3 different sites, each one supporting its own currency and a fourth one to serve as an international hub. All the sites are identical and separated through mapped subdomains. This is on a multisite network, so my main marketplace is going to have duplicates of his products from each distribution zone he has, which is going to be a problem.

I'm saying this because its a lot of work...

If MarketPress had some form of built in, front-end currency conversion, I would only have to build one site and users can have the currencies displayed for them locally though he could handle transactions in Australian dollars.

I researching ways to do this, I came across this plugin: http://wordpress.org/extend/plugins/localcurrency/

There is a demo of it here: http://www.jobsinchina.com/blog/the-cost-of-living-in-china/

And the detailed instructions can be found here: http://www.jobsinchina.com/resources/wordpress-plugin-localcurrency/

Right now, I'm thinking of of network activating this plugin and then hacking marketpress.php to have the <--LCSTART--> and <--LCEND--> html tags around any place where the price is displayed. (I haven't looked, I don't know if it will work, I'm just theorizing)

A better option would be to hack the plugin to overwrite the price instead of displaying the local price it in parentheses after the foreign price. This method would be better for the customers as they browse and should display the local currency prices. The fact that it caches exchange rates from Yahoo finance just seems like a really cool feature.

Could we get something like this coded into MP core? Or, should one of the fancy member coders around here build a plugin that extends off the concept of the Local Currency plugin?

I may not be the only user of MP who might find this useful, what do you all think?