You can automatically archive your tweets; but do you have to do it by email?

One of my pretty cool colleagues, @robcollingridge, commented on the move by ATOS origin to stop using email by saying "A mistake, email 2.0 is coming soon"

I recalled a post from Michael Mahemof (@mahemoff) - a pretty cool ex-colleague -  declaring 2010 - the year of email, and suggested he look at that.

A passing comment in there was how to get a searchable archive of your own tweets; so - 2 years on - I can now drop an email to one of my Posterous accounts (using the syntax [chosen site]@posterous.com) and it will automagically appear on Twitter - and on my nicely searchable posterous.

Do you have a better way of doing it?