[Red88Carrera]

I just went through this a month ago.
It sounds like your co-workers already know. Not necessarily a good thing.

Here's what I did...

1. Made sure I had the offer finalized, including a start date. They agreed on a contingency start date in case I was walked to the door after giving notice. I told absolutely NOBODY that I was leaving, and didn't tell them where I went until after I started my new job.

2. I took all personal belongings out of my office over the course of a few days.

3. I took my laptop home (as I did every day), and cleaned all personal info off of it. This included internet history, personal emails, documents, etc. If they want to recall it from a corporate backup, so be it. I left all company info alone.

4. I gave a written 2-week notice to my boss and made sure I was very professional. I did not disclose where I was going, but told him it was not to a competitor.

They let me go at the end of the first week, but paid me for the last non-worked week, and 4 weeks of unused vacation.

I was expecting to be walked to the door, as I worked in Engineering, and had access to confidential info and trade secrets. As much as you may want to tell them to "shove it", take the high road.