@massify we use:

- Slicehost (some hosting)

- Datapipe (hosting)

- EC2 (Document/media conversion)

- S3 (Storage)

- Panther Express (CDN)

- PBWiki

- PivotalTracker

- Protoshare

- DNSMadeEasy

- Hosted MS Exchange

- JIRA/Fisheye/Crucible