My philosophy was that it probably wouldn't do anything if I did continue but that whatever I could try and do to help the process wasn't a bad thing.
I feel the same way... I've switched to decaf in the last couple of months because it's coming up to 12 months since we started TTC.

In saying that DH and myself only ever drink one cup of coffee a day each.

Every now and then I'll have a normal cup - if Im with someone who doesn't know I'm TTC it's too hard to explain why I'm on decaf!!

I think as long as you're not drinking to excess it's ok...

As OceanPrincess says, each to their own!