Coffee grounds in Hugelbeets/defeating first year nitrogen scavenging?

Has anyone experimented with attempting to supplement with high N compost/coffee grounds, etc in order to keep the logs from creating food web nutrient scavenging? I have just started myself. I have a few small beds that I pilled fresh used coffee ground in half the bed. In another bed I pilled grounds that had been composted only for a month with straw/sawdust (with tons of mycelium growing all over them). Anyone have any results good/bad? I get 30 lbs of coffee compost a week so I'm all ears about how to use this stuff effectively.

Possible pros: increased mycelial growth; free supplemental nutrients for the first year as the mycelium and food web kicks in; increased decomposition of the logs

Possible cons: pH isssues, ??

I did this will all of my beds though I don't have any definite data to know how well this works. Here is what I added to each bed:

Top layer 10" of quality soil
Middle layer 2" - 4" of compost + vegetable scraps + greens + 10 gallons of coffee grounds
Bottom 8" - 10" of rotted wood

This summer will be the first test since these beds have been sitting idle for the past few months. Can't wait to see how my veggies do once they go into the ground!!