You can work on a TiddlyWiki file in Dropbox and publish a URL that anyone can use to see a read-only view of the file.
# Save your TiddlyWiki file within your Dropbox folder
# Select Dropbox's "Share Link" option to obtain a public URL for the file
#* In the Dropbox web interface, this is done by clicking the link icon that appears when you hover over a file. Dropbox also adds a "Share Link" item to the file context menu in Finder on OS X and Explorer on Windows
# The URL generated by Dropbox will have this form: