Improving the WebStore feature is part of my larger strategy to improve the popularity of mojoPortal. I talk about this on my road map, I need to first build a category/tagging system in the core of mojoPortal so we don't have to keep implementing it over and over in each feature.
It also needs more work to implement shipping calculations against web services by UPS, Fedex, DHL etc.
I plan to get to this as soon as possible but I have a lot of things to work on. Unfortunately I'm not at a point where its easy for me to delegate or get other developers involved in features that I am working on. Generally it goes faster working by myself as getting others involved requires more formal processes and this slows things down. Once I reach profitability then it will be easier for me to spend time coordinating the efforts of others but right now this takes time awayform development and I have to stay focused on my personal goals of reaching profitability. So I need also to work on more products to sell and this may delay progress on the store itself yet I'm not willing to let someone else in on the WebStore development as I feel its important for me to get that feature right according to my own evolving vision for it. What can I say, I'm an artist and a control freak ;-) Hope you can understand. You can be sure that the WebStore functionality will get to where it needs to be but I can't specify a timeline for it.