custom sidebars slowing load times

First - the product is great. I've just moved my html side to WP and custom sidebars are essential. That might be making the problem worse.

Using the P3 Plugin, I've looked at why my load times are so slow. It's two plugsins: event manager and, unhappily, custom sidebar pro. It's taking 2.5 to 3.5 seconds to load.

What can I do? I don't want to stop using it. The site is writers.com.

Thanks,

Mark Dahlby