Honestly, I don't want Twitter Advertising; TechCrunch reports Twitter Testing Advertising In Twitter Streams though there's no advertising to be found on Twitter at this moment.
However, were behavioral targeting and profiling part of the advertising selection, it's possible that Twitter could be very effective as an advertising medium, especially if it's based on the latest Tweets that a person enters into Twitter.
Just a thought - Advertising doesn't need to be a bad thing - and in fact, some of the Advertising I've seen lately, especially the type that runs in Second Life, could be good, depending on how it's done and displayed, the kind of AdWords advertising or Banner Advertising on Twitter that I get off of Search Engines and Publisher's sites would really turn me off.
And that seems to be reflected in the poll data on the TechCrunch page (see below)
Do you support ads on Twitter?