I started hacking something together this weekend, and this is what I have got till now.
All that a user will have to do is visit a login page and then, copy paste the following on the address bar.
Though the script is still in early alpha, you could check it out. Please do let me know of potential bugs, or usability issues. I have tried it on orkut, yahoo mail, etc. I would write a post detailing the use of the interface, a post that would also linked to as help from the page. Watch out this space for updates.
Lastly, why is it called Tackle ? Well, wikipedia tells me that a tackle is an instrument used for fishing. Well, this does help you in phishing !! :)