how long should I soak seeds...?

[WanderRA]

...to deactivate their enzyme inhibitors?

is there a universal time or does it vary depending on type of seed (ie will pumpkin seeds need 2 hours and sunflower just 1)

[SunshineMN]

http://www.veggiewave.com/soaking_chart

This URL is often posted here when this question is asked. :)

[streetsurfer]

Generally, the larger seeds need more time and small seeds need less. That's about as close as I can get you. Beans 12 (for mung)-24 (for garbonzo and the like). Multiple water changes in the longer soak periods helps.
You can go to the Sprout People online for a specific seeds requirements. They have a very good sprouting guide set up.

[WanderRA]

thankyou for the excellent link :)

[streetsurfer]

I guess I am wrong on 24 for larger beans. I apologize. Maybe not required, but I find my mung bean sprouts finish faster if I do soak longer.

[Raw Angel Mom]

If in doubt, rule of tumb is over night or 12 hours. The chart posted on this thread is very nice and well done.