The StrataFlix web sample has not been completed for a number of reasons....the main one being time and producing new product. As I have alluded to on some other threads recently, we have some very exciting news that we will be releasing soon (within the next 30+ days) about the new things coming down the pike as well as some interesting people now getting involved with SF. As a part of all of this, more samples and new technologies will be coming out as well. This will include this sample.As for PayMeNow, yes, we wrote an interface for this in our medical software, but this is not part of the SF framework (yet anyway). If you are trying to interface with PayMeNow I would be happy to share some of that logic if that is where you are trying to go.
If I recall, PayMeNow was one of the easiest to interface with as they had very clear and concise instructions for the http web request and response. It took around 30-60 minutes to create an interface for them. Posting our code will not be as much of an option as we have abstracted our interface so that we can communicate with other online processing companies as well.