Developing copy is always kind of a pain, given the different length requirements by provider. I had a preview tool I'd built for myself, but thought others might find it useful, so I put in on my site. PPC Ad Copy Preview You can type in your info, see your character count, then preview how it will look according to provider. Especially useful for Overture since different Overture partners whow a different number of characters. There are a coouple of other tools I've found useful as well that I've put up: Max Bid Calculator Overture Keyword Volume / Bid lookup combo