Quoted from robin:To be clear: I'm thinking about features that enrich the Pinside experience, but that are not necessary to enjoy Pinside.
For example, thing like UI theming, premium profile tweaks, PM attachments, topic/post notifications, tools like a scorecard generator, invite-only threads, marketwatch notifications, vip lounge etc etc - I bet there's plenty more and better ideas floating around. If/when I would announce premium accounts officially I would definitely open a thread to ask people for ideas. If you have them now, feel free to share them here!
Premium features should be enhanced basic features. For example, everyone should be able to send images via PM. A standard user can only send 2MB worth of attachments and a premium user can send 100MB (or probably less).
Marketwatch seems like a good premium feature.
VIP lounge content will end up getting posted to regular threads (see all the posts Jack makes in the JJP forum that immediately gets posted here) and would feel to me more like I'm being excluded from something rather than paying to be a part of something. Nobody wants to pay for friends.