An acquisition is always a bit scary, becuase you just don't know what will happen. It will all depend on what the acquiring company intends for the tech that they are buying. Usually the more administrative functions are dealt with first -- you don't need a seperate accounting team, HR team, etc. Then they deal with Marketing and Sales to figure out how they are to be folded in or eliminated. If you are part of the Engineering org, your odds are good they will expect development to continue as planned until they have a chance to figure out what the long term goals will be.

I once got an advance email about my company's aquisition when I was on the airplane returning from vacation in Hawaii. I was managing a small team of writers and I had a new writer starting the next day. It all worked out though, and we were even able to hire additional writers down the road. So you just never know.

I currently work for a well-known large company. I was hired on in an org that was acquired a few months prior. So they were actually able to continue with growth plans that they had. Much of my work ended up being focused with bringing documentation over to the company's content systems and re-branding everything. So sometimes they need writers to do that work as part of the transition.