You’ll find lots more information on fungi and slime moulds at the following sites:
Report from RBG Kew: The State of the World’s Fungi
Introduction to the Study of Myxomycetes (in Italian)
Facebook Slime Mould Pages:
Index Fungorum contains current names of fungi at all ranks
Basidiomycete Checklist lists all British Basidiomycete Fungi.
http://boletales.com/ a site devoted to Boletes with hints and tips for the beginner.
Cyberliber - An online electronic library for mycology