Here in Madison, Wisconsin, we have alkaline soil, and there is a layer of limestone that covers pretty much the entire southern half of the state. Our water is hard, and everyone uses a water softener. I generally use peat moss and/or compost when preparing the soil for blueberry shrubs. Our compost is made from mostly browns, and is therefore low in nitrogen. I have to add about one cup of granulated sulfur to the soil, and thoroughly mix it in, for each shrub. Also, I have to use an acid to lower the pH of our tap water, before putting this water down on the blueberry shrubs. I would like to collect rainwater instead, an am looking into this. I can't say that the methods that work for me will work for you, because I don't know that you have the same soil conditions and the same tap water.

Pine and Cedar shavings and Pine Needles are not going to significantly affect your soils pH although enough organic matter in your soil will aid in buffering the plants and soil. Start your process with a good, reliable soil test and determine what your current soil pH is and that will aid you in deciding what needs to be done to grow those blueberries.
You may well be better off putting your new plants in large pots for a year because it will take some time for the soil where they would go to change to provide the environment they need. Around here the soil is ideal for blueberries because the normally high water table creates anaerobic soil conditions that help make the soil pH ideal and provides sufficient moisture for them and low levels of magnesium help too.

Here is a link that might be useful: Montana State University CES

I tried several years to amend alkaline soil to the point where I could grow blueberries, and it never worked. Last year I dug them up and put them in containers where I have better control. They do seem to do better, one reason is that I can keep the soil pretty moist. I didn't lose any over the winter, and they grew reasonably well last summer.

I have read on GW several times and in several places that for those of us who don't have naturally occurring acidic conditions and moist areas, containers work the best.

I emailed back and forth with this guy:

http://www.davewilson.com/homegrown/promotion/bluecontainer.html

ANd explained that I couldn't find his ingredients in the Midwest.

I ended up with this recommendation:

50% pine bark mulch
30% potting soil mix
20% medium western bark

And add hollytone fertilizer at the rate recommended on the package.

I'd have mixed this up this weekend to see how it worked, but it kept pouring outside.

I agree with using large containers with acidic soil to grow blueberries. Also, be sure to use rainwater in areas of alkaline soil. Rainwater is not neutral but usually around 5 on the scale.

an aside: Saskatoons (serviceberry) are the best tasting berries in the world, maybe the universe, and thrive in alkaline oils. They can be used wherever blueberries are used.

I agree with using large containers with acidic soil to grow blueberries. Also, be sure to use rainwater in areas of alkaline soil. Rainwater is not neutral but usually around 5 on the scale.

an aside: Saskatoons (serviceberry) are the best tasting berries in the world, maybe the universe, and thrive in alkaline oils. They can be used wherever blueberries are used.

Fertilizing with cottonseed meal helps - it is quite acidic.
-O

Peat moss, elemental or split pea sulfur, and pine needles are all good ways to lower your soil pH for blueberries. However, I have read that you want to change soil pH slowly (not more than 1 point per year). Take your time and build the soil properly. As many have posted here, you may be better off growing in containers.