If you check SF.com you'll notice that out of a godzillion of projects only a handful thrive. It's only natural that over the course of time people loose interest in certain projects. There's a lot of reason for this to happen. Lately, I couldn't find time to work on some of my projects since I'd started accepting consulting contracts. I believe there's a lot of folks in the perl community who share a similar story. The need to earn extra $$ (to support family, that new car thing, and etc) at times overwhelmes selfless desire to volunteer to a good cause.
However, don't be let down by apparent lack of interest. My advice to you would be to proceed with the project even if you don't get a lot of initial responce. Start out by writing some functional specifications for the final system as you see it. There's a greater chance of attracting people to a project that already has something to play with. It'll also demonstrate a certain level of dedication on your behalf. Being in a position of project initiator, this is a rather important step to make. I find it that in the open source community there's nothing worse than to direct a lot of time and effort to a project that is bound to fail or remain incomplete. Well, a thorough design documentation will serve good to clear those doubts. ;)
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# Under Construction