I got my through snugglepie (just look at the beginning part of my ticker link to figure out the actual address).

You then need to register (it's free)...
then design your ticker...
then get the hmtl code
copy it...
come back to BB...
go to user options...
go to edit signature...
press the link button (and a little box will come up)...
then add your new link...
preview your signature to make sure it looks right...
and voila!!!