So, I blogged about this last November. For gutsy, with the latest Gnome, it's become now mainline. Fillable forms in Evince.
This is a huge step forward in functionality. The non Free version of Acrobat is... a little unstable for us (read: crashes constantly), and flpsed's a tad odd to use for end users. So, handling fillable forms right within Evince is going to make a big usability improvement for our users.
If we get the ability down the road to save a copy of the PDF with the forms filled in, that will be a really nice treat, and in fact, a step above what's available in the non Free version. But for now, my wish has been granted.