This is something I'm also interested in. I have heard this passage used to say that the elders of the Church should take turns giving teachings from scripture, and that the floor should thereafter be opened for questions and discussions (note the verse saying that women should ask at home if they have a question).

If I had to step into the shoes of one side and give an argument, I would say that this form of a worship service no longer applies because these people were speaking prophetically under the unction of the Spirit. That is why there was "judging" to be done of a prophet's words by the other prophets. If the gift of prophecy has ceased, then this method has also ceased.

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DAVIDIVS DOCTVS VTRIVSQVE LINGVAE
Husband of Emilia
Member: First Reformed Presbyterian Church of Durham (RPCNA) - Durham, NC
Currently in the process of transferring membership to an as-yet-undecided church in Chapel Hill
Student: University of North Carolina at Chapel Hill, German Literature and Classics