Vector blur?


Dear typophiles:
I'm experimenting with a blurred version of one of my typefaces. I have all glyphs as outlines, please see example:

This is what I'm trying to achieve:

I used Photoshop to blur the first image (Filter>Blur>Gaussian) and then Threshold (Image>Adjustment) to get the black/white image.

My question:
Is there a way of doing this while maintaining a vector format? (inside Illustrator for example?)