The journal THEORIA has just published its 72nd issue with a symposium on Lilian Bermejo-Luque’s, Giving Reasons (Springer, 2011. Argumentation Series). The discussants are John Biro, Harvey Siegel, James B. Freeman, David Hitchcock, Robert C. Pinto and Luis Vega.
In Giving Reasons, Bermejo-Luque attempts to set out and defend an original approach to argumentation theory that hinges on what she calls “argumentation as a second order speech-act complex”. The discussion that emerges between Bermejo-Luque and her distinguished panel of respondents about this approach to argumentation theory is an interesting one. Click here to view the journal page, from which all articles can be accessed free of charge: http://www.ehu.es/ojs/index.php/THEORIA/issue/current.
RAIL 
I think “argumentation as a second order speech-act complex” is not an original approach. Any pragmatic conception of argumentation is bound to take this approach. And many have.
Ah, there’s me typing carelessly again. By ‘original’ I meant more that Lilian’s developed the theory independently of the main alternatives currently extant in argumentation theory. She tries to take them all on directly in some way in much of her work. You’re certainly right that there are other theories that make heavy use of the notion of speech-act complexes, but I think she’s trying to deploy the idea somewhat differently than they do. That’s what she’s trying to do, near as I understand it, anyway.
Be it truly original or no in the end, I’d still say that the interchange that occurs across the papers makes for some interesting reading.
Good to hear from you, btw. Was wondering what you’ve been up to these days.