just a reminder you can add a follow me on twitter button to your postbit (the section which holds your avatar to the left of each post) To add the button click forum actions drop down menu at top of forum. Select edit profile. Or click here Scroll down to Additional Information and complete the twitter section with your twitter username (without the @)
Maybe post a sticky andytyke for ppl to just post their Twitter username as I (don't know about others) don't really look at peoples signature.