=== How do I link to the latest revision of a file? ===

Find the URL for the file and then replace the changeset identifier with {{{tip}}}.

=== How do I change the style of the web interface to the visually more attractive gitweb? ===

In [[http://www.selenic.com/mercurial/hgrc.5.html|hgrc]] set

{{{
[web]
style = gitweb
}}}

To switch back to the default style specify "style = default" (see [[http://hgbook.red-bean.com/hgbookch6.html#x10-1390006.6.5|hgbook]]).