Texts to Have
Dubliners
A Portrait of the Artist as a Young Man
Ulysses
Ulysses Annotated, by Don Gifford
Finnegans Wake (if you dare)

Sources of Information
James Joyce: The Brazen Head
The James Joyce Centre
James Joyce - Biography and Works
Official Dublin Tourism Page
Irish Authors

Joycean Miscellany
Wonderfully Useful chapter summaries & analysis of Ulysses
A Critique of Ulysses
Some humour: Ulysses for Dummies
FinnegansWiki