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

One of the lack in the Railo world was the availability of an inline debugger. I always use fusion debug or internal cf inline debugger when using abode cf and sometimes I felt the lack of that developing with Railo.

The good news is that a railo compliant version of Fusion Debug will be available very very soon ( the public beta programm has just finished some week ago ). I had the opportunity to test the beta product and was working just fine as I expected it.

The functionalities are great and basically the same of the Fusion Debug version for coldfusion. Installation gave me some trouble that I easily solved on the google groups that the guys of Integral setted up to support .  

As far as I know the enterprise Railo edition will include a license of both Reactor and Debug products. I am a Fusion Debug license owner but I am not sure if the Railo product will need a license update or not. I am waiting the product release in the next weeks to check it. 

In conclusion I think that having an inline debugger available make Railo even more a robust solution.