@crackingmedia,
1. I decided to use WordPress because (a) I love WordPress, and (b) because a lot of bloggers spend a lot of time bragging about how many possibilities WordPress has, but they never actually seem to do anything with it. So I decided (with a bit of help) to push the software to its limits.
2. I've also read about Mosets lack of support lately. I'll be honest, I haven't used it for about 2 years, and haven't tried it on Joomla 1.5. But there are alternative Directory components available.
Take a look at these.
As an aside, I'm loving my WordPress directory. It only launched yesterday (with only 2 members so far), but I've bolted on a blog with one-click and have plans to add a BBPress forum soon. Development was also really quick; it took 3 days to build. In the hands of a decent programmer, you can make it do anything.