You could use the timestamp of their last update - I imaging this would work for most needs, unless you truly needed to know the last time they accessed Twitter and browsed.
On Jun 17, 7:07 pm, Stuart <stut...@gmail.com> wrote: > 2009/6/17 drewcrazy <andrewila...@gmail.com>: > > > > > Is there currently a twitter call that can capture the last login date > > of a user? > > Nope. > > -Stuart > > --http://stut.net/projects/twitter