Effectivity of web 2.0 after penguin update

They still work great. The secret is you have to built quality links to your web2.0s. And you should also diversify your anchor text as well.

Original articles + web 2.0's are working better now than ever before. I suggest you revisit your linking strategies. Mix up your anchor text with https, www's, click here, etc. You will also want to point at authority sites like wiki, .gov, etc.