[ale] USB to Serial adapters

Any recommendations (maybe a FAQ/site/info) for *supported*
and/or recommended USB-to-serial adapters for Linux/BSD/MacOSX?

Thanks,

-kc

Follow-Ups:
- [ale] USB to Serial adapters
  - From: james.sumners at gmail.com (James Sumners)
- [ale] USB to Serial adapters
  - From: mhw at WittsEnd.com (Michael H. Warfield)
- [ale] USB to Serial adapters
  - From: lists at serioustechnology.com (Geoffrey)
- [ale] USB to Serial adapters
  - From: lists at cruton.info (Giulio (lists))
- [ale] USB to Serial adapters
  - From: dkg at fifthhorseman.net (Daniel Kahn Gillmor)
- [ale] USB to Serial adapters
  - From: chris.kleeschulte at it.libertydistribution.com (Chris Kleeschulte)