I only have a bucket for now but other attachments have been an issue to me lately because I want a posthole digger. I also need a rototiller and would like one for my PT. The PT tiller is about the same price as a Sears tiller and probably better. I called PT and they said they can still provide three pin attachments.
Yup, they can still modify attachments to work with the 3-pin deal. I believe they charge $100/attachment to do that.
Good luck. Let me know if you want my 24" earth auger. I really don't have much use for one that big. I need a 6" and 9", but there's nothing I need the 24" for...