Making sort links on views better exposed filters toggle
Right now, BEF doesn't have a lot of extra classes or IDs that would facilitate this. You could post a feature request in the BEF issue queue requesting the necessary additional markup that would make this fairly simple using jQuery.

At a minimum, you'd need some sort of "active" designation so you knew which link reflected the current sort options.  Currently the active sort option is displayed as plain text (rather than a link) but there's an issue requesting the active sort be displayed as a link.

However, I should point out that I'll be out of town most of Aug and wont' be on the issue queue much... (I'm the BEF maintainer).

I'm always open to bounties!  :)