Peter van Dijck expresses frustration with the slow pace of new thinking in his information architecture research agenda. Lots of good response on SIGIA and the aifia-members lists that Peter sums up on his blog.

In particular, the question of whether we need more research, or whether we need more innovation is important. While basic research is valuable, many of Peter's points revolve around cross-training with other disciplines like business management or ethnography...often a quicker win for practitioners.

The problem of a slower flow of new ideas is also from maturing practice - our current tools are good enough to get by, so we aren't as motivated to find new tools, even though they might be better.