Recently created topics in Wordpress about WordPress Self-installed

Fighting wordpress spammers.What if we all donated a few minutes a day for fighting all forms of spam? ISP's could start this as a campaign.

Dirtying my hands moving the blog from Blogger to Wordpress. Anyone tried this before?

So I thought I might start a topic to discuss what people's favorite WP plugins might be. Perhaps you have a few that are not well known or popular but are nevertheless quite useful

I'll go first:
BCSpamBlock: This is an amazing spam blocker. Ever since I installed it I have no more need for Bad behaviour or akismet and it does not use the moderation queue.

One Click Install: It makes installing/upgrading plugin and theme hassles a thing of the past.

Robots Meta: A Lightweight SEO plugin to help with your nofollow and noindex links.

Simple Pie: For people who like displaying various feeds on their site, this is a nice option.

Yadis: Use your own blog address as an OpenID

Edit Comments XT: For themes without preview functions, this is very useful.

Subscribe to Comments: People don't always like to use RSS feeds for some reason, and many are used to the Blogger type of email subscribing. This plugin does just that and helps sustain the conversation.

So what what nice ones do you have?

Has anyone upgraded to Wordpress 2.5? I have a popular blog that I'm afraid to upgrade since it might totally crash the site, however my sites admin section does have a couple of bugs in it like when I hit the Publish button, the browser goes to a blank page, which I'm hoping that upgrading would fix.

Also I've been having troubles with plugins such as the Google Sitemap Plugin and the All-in-one-SEO Plugin.

Has anyone come across anything crazy while upgrading?