This can be done, and I think it is preferrable.
I have seen the hyperlink put into the subject line or Intro by concatenating the library with the file name of the form.
If all you want is the template then that is static and should be very easy.
Also with IP2007 you can select not to attach the form which automatically puts a link instead.
The template is in the library, in the forms hidden folder and called template.xsn if you do not know.