A few interesting ways I keep an eye on longer term technology trends.
Google Trends: php, coldfusion, java, .net, ruby (This one has some problems, as “java” comes up for the country too…)
Indeed (job listing aggregator)

| php, coldfusion, java, .net, ruby Job Trends | php jobs – coldfusion jobs – java jobs – .net jobs – ruby jobs |
Drill down to Java ORM frameworks (and JDBC itself)
