I'm certainly not just sitting back and doing nothing, instead I'm searching for that idea that really grabs me, and will keep me going in my free time. The idea for a part time business needs to be more engaging and interesting than a full time idea (at least for me), because I've already spent most of my mental stamina grinding through a day job by the time I can get started on the personal idea.

Either way, I have developed and launched http://www.irclogger.com in the last few weeks, just because I wanted this service and couldn't find it. (logging freenode's irc channels). But I have no plans to commercialize it, and wouldn't feel bad if it disappeared.