That sounds very similar to how my little boy Rory started out. Basically he would seem like a little angel during the day - sleeping and eating quite well - but then at night he was up for hours on end and only slept fitfully. I worked out that he had his days & nights reversed and it really was a horrendous time until we go it sorted out (I always flash back to it whever I contemplate the idea of having another baby!).
I too had read the BW book and tried to implement all the strategies What I found was that some things worked, some didn't and some I needed to modify a bit. As a general statement this is probably not very helpful to you, and I am certainly no expert, but given the situation seems similar I thought I would let you know what worked for me in case it might assist.
To change the day/night thing I always made sure I woke Rory up for feeds during the day although not always as often as the BW book suggested. I made sure he got a few good sleeps in a day as he would be even worse if he was completely overtired and wouldn't feed well anyway. He was a small baby when he arrived (2 weeks early) - only just over 6 pounds - but I found that putting him on to a very short cycle for feeding/sleeping was just too disruptive. It doesn't seem to have caused him any problems to go a little longer as he has gone from being the second smallest to the biggest baby in my mother's group! I tried to concentrate on making sure he fed well at each of his feeds. To wake him up if he fell asleep when feeding I would change his nappy half way through, which he didn't like at all back then, so it usually worked.
We also moved Rory from our room into his own room and I made sure that all my night feeds were done in a relatively dark room (just a dim lamp on) and that I didn't talk to Rory or interact with him. He did eventually get the idea after all of this that night time was for sleeping. What then made a huge diference to the number of times he woke at night was swaddling him quite tightly. The first time I tried it (and perservered even though he didn't seem to like it) he slept for 5 hours straight, then the next night 6 hours, which at the time I considered to be a miracle. I can still remember the first time (when he was about 6 weeks old) that I woke up after having had a 6 hour stretch of sleep. I really did feel like a completely new person. Oh, and right from the start I also used a kind of modified shush/pat - I didn't roll Rory over as it would disrupt him so I would stroke him and do the shushing. For months I wondered if it really was having any impact but then since he was about 3 months old when he wakes up at night and it isn't time for a feed I can usually put him back to sleep just by shushing him. So somewhere in his mind he must have developed an association between the shushing and sleep; it just seemed to take a long time to develop.
At any rate, these are some of the things that worked for me. So hang in there - although I didn't really believe it at the time it does get (a lot) better.
