I tried to get my corp to adopt the following, but they went for the lawyers instead:

This isn't lawyerese. We hope it is easy to understand.

1. Please don't tell other people about what we're doing.

We won't tell anyone secret stuff you tell us.

2. We'll try to tell you what information we consider secret

You tell us what you consider secret

3. We're not granting permission to do anything with the information

Neither are you.

3. After two years, all bets are off

4. This doesn't apply if:

a) You already knew our stuff or we already knew your stuff

b) It's public knowlege

c) You (we) hear about it from someone not under NDA

d) The secrets must be revealed to comply with the law.