Booking Calendar Professional / Premium | WP Develop.

Very Useful 65 Wordpress Hacks | Design your way.

WordPress vs. ExpressionEngine: Apples and Oranges? | Webdesigner Depot.

Plugin WP-Table Reloaded (English)

Post Mash Filtered « Post Mash Filtered.

10 NEW WordPress Wanted Hacks and Powerful Techniques » DevSnippets.
 
a few nice new things to have for your wordpress blogs. I think I may even try a few here in the new design for this site.

10 Things You Need to Know About WordPress 2.9 | Technosailor.com.
Just cuz 2.9 was released yesterday. I have upgraded my personal blog. No problems, except the upload of media, says can’t create the directory, even after I manually create it. Wants to know permissions, and since I’ve been uploading to the damned thing for years now… I [...]

How To Fully Secure Your Wordpress Blog
Is this what you do? The version hide plugin is good. What else? any other tips/plugins?

I have posted before with links to WordPress membership plugins, here for Synergy Software and here for WishList Member. Recently I was able to find a few more of these plugins.
WPMembers
Membership-Plugin
WordPress e-Member
Wordpress Membership Site Plugin – MemberWing

16 WordPress Sites to Help You Build a Better Blog.
sixrevisions.com has a very good list here. If you are just dipping your toe into wordpress, or even if you are a seasoned pro, you can get quite a bit of good info from the sites in this list.