I have compiled all available reports of Greek lichens and lichenicolous fungi into a simple atlas, available here as a pdf file.
I also have a large database of worldwide distribution data. To put it online here in a form that is easy to view and easy to use, and then to maintain it all here, would require more effort than I am willing to commit, but if you need the reported distribution of some taxon, or a checklist for some country or subdivision of a country, feel free to contact me. I may be able too assist. The dataset is large but not complete, and it does contain some old records that may not be reliable, so it must be used with care.