Here's an excerpt from the About TextGrid page:
TextGrid aims to create a community grid for the collaborative editing, annotation, analysis and publication of specialist texts. It thus forms a cornerstone in the emerging e-Humanities. . . .
Despite modern information technology and a clear thrust towards collaboration, text scientists still mostly work in local systems and project-oriented applications. Current initiatives lack integration with already existing text corpora, and they remain unconnected to resources such as dictionaries, lexica, secondary literature and tools. . . .
Integrated tools that satisfy the specific requirements of text sciences could transform the way scholars process, analyse, annotate, edit and publish text data. Working towards this vision, TextGrid aims at building a virtual workbench based on e-Science methods.
The installation of a grid-enabled architecture is obvious for two reasons. On the one hand, past and current initiatives for digitising and accessioning texts already accrued a considerable data volume, which exceeds multiple terabytes. Grids are capable of handling these data volumes. Also the dispersal of the community as well as the scattering of resources and tools call for establishing a Community Grid. This establishes a platform for connecting the experts and integrating the initiatives worldwide. The TextGrid community is equipped with a set of powerful software tools based on existing solutions and embracing the grid paradigm.