Actually, proper use of the ALT text attributes are most important to Google and so is using a sensible name for the image itself.
For example, a corporate heading image named: header.gif is useless to Google (can you imagine how many header.gif names are on the internet??), better it is named visual-net-corporate-logo.gif, this Google can use.

So yes, use a fancy font as an image, but remember to make use of the ALT attribute to describe it with text. It's why it exists.