As I blogged in the past I am a fusion debug user and I was waiting the new release that also cover Railo 3.1 as debuggable cfml engine. Here more informations about the new fusion debug release:
New features included in FusionDebug 3.0
Full support for Railo 3.1 Open Source / Enterprise
Conditional Breakpoints
Break on Runtime Exceptions
Run To Line
Custom Extensions
Detailed Feature Focus: http://www.fusion-reactor.com/fd/featurefocus/
Quick Links
Download: http://www.fusion-reactor.com/fd/downloads.cfm
Upgrade: http://www.fusion-reactor.com/fd/upgrade.cfm
Buy: http://www.fusion-reactor.com/fd/buy.cfm
Other Sources
Fusion Newsletter: http://www.fusion-reactor.com/newsletter/August2009.cfm
Press Release: http://www.prweb.com/releases/2009/08/prweb2733124.htm
