Well, actually it's DBD::Yaswi and it's broken, but it's nice to see movement there again.
Also, Language::Prolog::Yaswi has now been uploaded and it lets one compile with the 5.4 series of SWI-Prolog (actually, it requires it). 5.5 is not yet supported because SWI-Prolog hasn't yet made Unicode available through their foreign interface. Since that's the primary change, there's no reason to support it (at least, that's my understanding of the reasons for not supporting 5.5). I am hoping that we see more stuff from Salvador García soon. This is great stuff.