I'll just weigh in to the Cydia store with something that I posted on a different forum:
People who are saying that Saurik is likely to get sued by Apple are pretty ignorant; for one, experts in DMCA laws from Berkeley, Michigan, etc. have chimed in on the issue and have said that Jay Freeman would have a pretty "good defense" when it comes to the issue of the legality of the Cydia store, primarily because Apple would rely on copyright infringement laws, which cannot be used to justify unfair competition/monopolies on certain services. Two, Apple would really not have anything to gain from suing, simply because they would be doing so in order to prevent profit-making from another party who is offering services that Apple themselves would probably not have allowed in their own store in the first place. So, why would somebody sue Freeman for selling products/features that Apple wouldn't have been selling anyways?
Also, I really don't think this will cripple the amount of free Cydia apps that we get now, simply because many companies that offer commercial products already have established ways of charging for their apps. On the other hand, this sort of thing could also breed a tremendous amount of competition within the Jailbreaking development community to come out with similar products and perhaps offer the best ones for a small price, meaning WE win out when we are offered new apps/features that have been thoroughly tested, even if it means paying a small price.
The last thing I want to mention is, no matter what comes out on the store, pretty much everything will be reliant upon the end-user, YOU. If anything you buy violates the terms of the contract you have with your wireless carrier, or even Apple, you would ultimately be paying for whatever consequences may come of them, and not the company that distributes those apps. You're also at risk of making sure you read license agreements just in case some apps end up charging for updates, or if future firmware updates break certain apps. Just a heads up.
I am actually really looking forward to what the Cydia store will bring in the months to come...just think that if we now have turn-by-turn navigation, tethering, video recorders, themes, the possibilities are endless now that developers have a serious way of bringing their product to the jailbroken community.