JF's org: 20+ year Legacy Sun - here's my experience:
Day of layoff - notified via phone by manager (I had a scheduled vacation day)
This is your official last day. Benefits end that day, no 30 or 60 day period to find another job.
Fed-ex package arrived later that morning with severance paperwork
Package included a live check of built up vacation time
I got the max - 26 weeks - lump sum direct deposited, provided once I sent back badge, laptop, etc.
Oracle pays first month of COBRA then you're on your own and it's VERY expensive!
Started looking for work two weeks ago and am a final candidate at two companies.
I would've enjoyed more time off if medical insurance wasn't so much.
Good luck and hang in there.