Well examing the code that your web site will always tell someone that first: you are using joomla, then advanced developers can find out that you also use !jocomment and so on.
Look at the js code that we generate. All functions are starting JOSC_ because we don't to have a problem from the sort
function hello
and then in your script you have again
function hello
that is why we use JOSC_hello
It is not bad that your users can see what software you are using. Why should it be bad? Are you hiding that you are driving a FORD or VW or BMW? Nobody bothers what you use - just keep it updated
Well I expect to see joomla 1.6 this year and upgrading from 1.0 to 1.6 will be impossible. You have to go through 1.5 . So perhaps it is time to start migrating.