(keitai-l) Recommendation for shopping cart software

Any recommendation for shopping cart software accessible by visitors by both 
PCs and keitais (DoCoMo/au/vodaphone)?
The administrator have only to register a product once and that will be 
reflected in both PC and keitai sites.
If possible, written in PHP/MySQL and souce-code customizable.

Not sure if this is off-topic, if it is let me know at what forum (English 
or Japanese) I can post this.

Thanks in Advance,
Roberto