A couple more updates are now up at my blog. Let me know if people are still reading, and want me to keep updating this thread.
It's now becoming more apparent to me why the reboot failed - the last five or six issues have on the whole been pretty poor. Mackie actually has a good handle on Spider-Man's character and nails his voice most of the time. He also writes him and MJ as a couple fairly well, when he isn't trying to create artificial tension between them. The problem is with the subplots. Mackie seems desperate to introduce 'tension' in their relationship, whether through Jill Stacy flirting with Peter (although at the moment that is fairly subtle) or Peter and MJ keeping secrets from each other. Both have been implemented very poorly, and come across as pretty unbelievable.
The absence of Tricorp is also a big problem. I get the feeling that Peter's new job may have been forced on Mackie, as he actually seems quite confident using the Daily Bugle and includes them in most stories. His version of Jameson is a bit old school, but has still led to a couple of amusing moments. It really bothers me though, that after getting a great new job (and lets not forget, being very excited about it) Peter has barely shown up, or even mentioned it. At the moment it just makes him look like a fool, which is a shame as Mackie does write the character quite well for the most part.
Josh, I greatly enjoy your reviews and hope they continue. Great stuff, man!