TOOL TYPES

Over Here (local tool on your desktop), Over There (you install and host on your web server), Way Over There (central installation and hosted on someone else's web server). There's a detailed list at Blogroots.

OVER HERE

Radio Userland, iBlog

OVER THERE

Movable Type, Greymatter, PHP-Nuke

WAY OVER THERE

TypePad, Blogger BlogSpot, AOL Journals, LiveJournal

WHICH FOR YOUR BUSINESS?

So, which tools are best for business? It really depends on your needs. Sometimes hosted tools like TypePad or Blogger might be sufficient. Other times you may require the customization and flexibility of tools like Movable Type or Greymatter. Truth it, it's up to you, but here are some things to consider:

MORE REVIEWS AND COMPARISONS

CNET reviews 4 tools (Blogger Pro, DiaryLand, LiveJournal, Radio). PC Magazine reviews 8 blog tools. Radio Free Blogistan takes on Radio vs. Movable Type. Another list of resources that might come in handy.
NEXT: Pitfalls