[Moin-user] Help with Macros and entities

[Simon -- One spam and this email address vanishes into the great big bucket in the sky]

I have a few questions at 

http://twistedmatrix.com/users/jh.twistd/moin/moin.cgi/Simon

that I'd really appreciate some guidance on.

In particular I want to be able to munge email address on MoinMoin pages so they can't be read by your average spam bot.
Also I'd like to be able to include some html (to call javascript or insert formatting and links I can't otherwise do) {cf http://gracefieldtm.wellington.net.nz vs 
http://gracefieldtm.wellington.net.nz/moin.cgi}

My difficulty is I can't seem to get the HTML macro to work - see details at the first URL above.
Additionally entities (eg .) don't appear to work in URLs.

Any constructive suggestions and advice are keenly sought

TIA  Simon