[mikeyur]

For a separate project I've worked on (non-YC), we negotiated 50% off bandwidth and somewhat reduced server rates. You just need to ask for it.

Not sure what the YC deal is, but I assume it's similar.

[aaroneous]

I had a similar experience: with minimal negotiating we were able to get 50% off their initial quote. I also renegotiated our terms later within the contract period with relative ease.

They pad their pricing pretty heavily, so don't be afraid to ask.