There are two indicators that I looked at in the summary to see which way the court leaned.
1) If one assumes that Chief Justice Roberts is a tad more conservative than Chief justice Renquist was, then you could argue that the court slid slightly to the right. Roberts voted in the majority 92.4% of the time in the 2005 term in crontrast to Renquist being in the majority only 78.3% in the 2004 term.
2) Justice Kennedy - the new swing vote, and arguably more reliably conservative than O'Connor - voted in the majority 88.4% time in 2005 compared to 85% in 2004. Definitely a good indication.I highly recomend that everyone download this document. It has break downs by case, and many many other bits of valuable information.
I found this info via SCOTUSblog.