Update: This is simply not a supported command, see here for more info.

I was trying to send a Twitter update in the format of Tips @Username but it wasn't going through. So I went to the old fashion Twitter web site and I tried it there. Twitter returned a response for two seconds and I snapped a screen capture:

Twitter Stops Tips Command?

Twitter said:

We're no longer supporting this command. Soon it will be received as an update.

Signs of something to come? Give it a try yourself on Twitter.com and if you are not following me, why not? I am at twitter.com/rustybrick.