Slow down the slideshow on the front page (especially the transition between the slides).
You might consider making the logo much smaller – it seems too loud for a minimalist design. If you want to keep the large version somewhere, I’d suggest it might look nice as the first frame of the slideshow.
I’d recommend making your text blocks narrower (or possibly using columns). Long lines of text are harder to read.
Or perhaps make the social icons black and while like just about the rest of the page. If thats the color scheme you want, I’d make everything black and white. Then, on hover/rollover, add color to elements like the social icons and the charities at the bottom.
The logo does look a tad awkward centered because of the small rag circle. Left justified might look better.
Again, the slideshow might look better slower.
I’ve thrown every single thing I can see at you. I like the site as-is.