I'm a member - since it's my startup I'd better be! I'm obviously biased: While we're only a month or so old, I'm seeing real value and real interaction going on within StartupToDo.com. Re your (good) questions:
1 Are the start-up guides valuable and worth subscription fee for non-newbies?
2 Is the community valuable and worth subscription fee?
Re first question: Eric Davis (https://twitter.com/edavis10) is a member of StartupToDo.com. He tweeted 32 days ago: "Was just about to research this: RT @BobWalsh: Just added to http://startuptodo.com - "Pain free server/hosted domain uptime monitoring." http://twitter.com/edavis10/status/4566939370 then six days ago, "Perfect timing yet again: RT @BobWalsh: Just added to http://startuptodo.com - "Inexpensive usability testing with UserTesting.com" http://twitter.com/edavis10/status/5240408333.
This is exactly what I'm aiming for: Instead of spending 2-3 hours googling how/where/when to do a task outside your core expertise, you find a Guide that lays out a way to do it, with comments and ratings from other community members, and you get it done in 15 minutes. If that - and that alone - happened once a month, I think the 2+ hours you save is worth the $30 to $15/month you pay. Don't you?
Re second question: The community is valuable in a couple ways now and more so as it grows and I add in certain features. Now, if you have your web site up, other members can quickly review it using a StartUpToDo.com Site Review form - instead of going to places like Joel on Software Business of Software forums and asking for reviews there (in public where customers can find it, uneven quality, no quantification).
Why will they review your site? Because the more reviews you do, the higher up your Site Review Request is in the listings... Also, Members can befriend other members: Your friends see what points you've earned, what Guides you are working on. - a good opportunity for collaboration and a bit of healthy competition.
Not that I am knocking communities like this, or Business of Software (I've been a moderator there for 4+ years), or HackerNews. But my focus is short-circuiting the "spend all your time figuring out what to do, no time left to do it" problem and the "bootstrapping is too damned hard, how do I know I'm making progress" problem and the "endless opinions and talk and information, but what do I DO next?" issue.
Let me sum up: if 1 Guide on average saves you 2 hours in an entire month, and your on the monthly subscription, ($30), you are ahead of the game. If 2 Guides, or 3, or 4... Bingo! The community is steadily growing, and since you have to provide your credit card info to Amazon to join, everyone is pretty focused, helpful and want to get on with the business at hand. Plus, while you give Amazon your okay to bill you, that happens after the free week's trial and you can cancel in two clicks.
Hope you don't mind this longish answer - but it's something I care about deeply! :)