The Pagan community (or more strictly, the Neopagan community, but more about that in a moment) is a small but varied place. It includes Wiccans, Druids, Hellenism, Heathenism, and a variety of other movements, united mostly by a common efort to revive (and often, necessarily to reconstruct) one or more of the pre-Christian polytheistic religions of Europe (hence Neopagan). The emergence of modern Paganism was made possible by 19th-Century Europe's discovery of its deep past (in the form of folk tales, ancient long-forgotten manuscripts like Beowulf or the Nibelungenlied), and the spark they struck to Europe's collective imagination, most notably, in such works as Wagner's Ring cycle. The branches of Heathenry that worship the Norse or Germanic gods necessarily look to such works as the Poetic Eddas for guidance, which means that they value alliterative verse and incorporate the composition of alliterative verse into their life and practice.
Note: The poetry linked here may range in quality from novice work to brilliant. It is probably just the tenth of the iceberg that shows above the ocean. There is almost certainly much more out there. Send me links if you find them ... use the following email, making the standard substiution: pdeane[at]alliteration.net