No worries. Looking really good so far on my Nokia E71. Loads very fast over 3G. I'll play with it plenty more over the coming days but my only suggestion so far would be an option to click on the charts to enlarge them a bit. They're way too tiny to be useful as-is.
Thanks for the feedback. This was a concern of mine. I knew making it too large would be a problem on some devices - and theres no such thing as too small as long as the data is legible. I haven't been able to find any data regarding average mobile device screen resolution. I'll try making the images a bit larger and see if it works fine.
In this day and age, I think using a width that will accomodate 240p-wide screens will likey be safe. Having the small pre-click size will take care of any old smaller displays.
Depending on the browser/OS, yes. Most popular phones these days have at least a QVGA display though (240x320 or 320x240) so if the enlarged size is < 240 wide it will likely fit on most screens.