Tipping on reddit is fun, but it's annoying to have to either receive a tip, or sign up for changetip and fund it yourself first. Usually when you see something tip worthy, you just want to send the tip right away.
What if you wanted to tip trolldude2014, you could just send a TITAN transaction to reddittip with the memo "trolldude2014", and he would then get a PM asking him to reply with his account key or TITAN name in order to get the transaction to his wallet instantly?
The drawback would be that we wouldn't see the tipping actually happening in the thread. This could be solved by having the memo contain two usernames, first the guy you want to tip, seperate by space, and then your own username. The bot will then search your posts to see if you mentioned it anywhere, with /u/btsxtip or /u/usdtip or something like that (depending on the bots name). If it finds you have mentioned its name in a post, it will then make the changetip style message in response to your latest post mentioning it, and also tell the tip recipient which post you got tipped for. Once you have told the bot your name once, it will always know to look for your reddit posts whenever you tip anyone afterwards.
The perfect system would be if it was possible to send to an arbitrary subaccount of the reddittip TITAN name, so you could just send 2 bitusd to trolldude2014.reddittip without having to write a memo, but I guess this isn't possible. Another thing is to be able to paste the comment permalink into the memo so you can tip anonymously while still showing the tip message.
You can even send the tip, then make the post saying you sent the tip afterwards with the /u/usdtip, as long as you used your own username in the memo, or used it at an earlier time so the bot knows you, then the bot would recognize you and post the tip message.
Of course the entire system should also work the standard changetip way, and it should be possible to tip bitusd directly with a changetip command the standard way. Registering your TITAN name through reddit should also be possible so you dont have to write two names in the memo field even once.
Would be great to see "supdudelol9001 just tipped you $2.00 (2.0123 bitUSD)" on reddit.