would it be possible to have a box to click so that we could follow topics without posting?

Perhaps I am misunderstanding your question but there is an option to follow a topic without having posted. Top right of page, click on Follow this Topic:

i am using the mobile version of this site. There is no option to follow unless i post.

i am using the mobile version of this site. There is no option to follow unless i post.

Yep, misunderstood the question. Will look a little closer at the problem.

cheers. unfortunately i can't use the app for iphone or android as i am a nokia user..

anyone else using symbian?

Just looked a little deeper. If you are using the Android or iOS (iPhone/Pad) Thaivisa Application then it can be done by pressing and holding on the topic title and Subscribe.

//edit - you posted while I was checking it out and posting. Sorry for the crossing posts. Will have to see what other Nokia users suggest.