Hi Sara,
In WPMU, the multi-user variant Wordpress, this is controlled by wp-includes/kses.php which defines a set of filters to be applied to the content.
I don’t know whether there is a right way to extend the allowed set, but searching for that might help.
Regards,
Martin.

Ah, but I'm just running on the hosted Wordpress, not my own install. I guess I'll have to make the jump at one point.

Hi Andrew. I wonder if this story from Australia throws any light on the subject? A software company is taking legal action against the moderators of a forum for negative comment about their products.

http://www.theregister.co.uk/2007/09/12/2clix_sues_site_over_critical_comments/

You can see those who sent their info to you... not those to whom you sent your info.

Etelos has already solved the "contacts" issue (though it does not work retro-actively, for the contacts to whom you have already sent your contact info).

Don Campbell was great in following up on this issue. Thanks!

Not at all addictive. I can quit twitterring any time. I quit 20 times today already.

Jack - Thanks for pointing out the great resource!

Bill - my main question is: will we see services similar to Twitter made available for enterprises? Or will the professional use of Twitter (which is very much proven by resources such as the collection previously mentioned) remain wholly at the individual level?

I fully agree that there doesn't seem to be a strong case for an enterprise Twitter at the time being. However, at the very least, Twitter has raised our expectations for other services and given us an idea of what is possible.

Twitter is not really a standalone application itself.

Berkay - I'm very excited to hear about your product! I'm just back from a very busy day at the Office 2.0 conference, so will take time tomorrow to do an in-depth review of your product - but I really like your approach.

Hi Bill! Really nice blog post! Thanks a bunch for sharing it with us and for showing some of the concerns on the potential business use of Twitter. I must say that I agree with Jack on his comments about trying it out. Believe me, it will change your perception about it. Many months ago I was on the same situation as you described above. I then decided to give it a try for a few weeks and as a result of that initial trial it has become now one of my essential tools to keep in touch with my different social networks.

So much so that some time ago I created the following blog post to reflect how it could well be used from a business perspective: "<a href="http://www.elsua.net/2007/03/15/10-reasons-why-twitter-will-help-improve-your-already-existing-social-networks/">10 Reasons Why Twitter Will Help Improve Your Already Existing Social Networks</a>". As I said, you will have to try it to see the potential. Best part of it though is that there are a whole bunch of KMers and E2.0ers already on it and plenty of really good conversations going on the side. Hardly to be missed. Then perhaps you could convince me to make use of Facebook, and why you are on it, because so far I haven't bought into it yet ;-)

Oh, one final comment, inside IBM we are already toying with the idea of a Twitter enterprise app. and although it is still in its infancy, it is getting more and more traction by the day. It is called <a href="http://www.google.com/search?hl=en&amp;client=opera&amp;rls=en&amp;hs=Sjx&amp;q=bluetwit+ibm&amp;btnG=Search">BlueTwit</a> and its value is just tremendously for such a large corporation.

PS. <a href="http://twitter.com/elsua">Here is my Twitter handle</a>, in case you would want to connect ;-)