Would there be a way to show in the profile view the last login date? I hate looking to trade with someone and them not responding because they don't use the site anymore.

Additionally, is there a way to weed out the traders with 0 or less than 0 feedback when doing a card search? These would make trading SO much nicer!

You can see the person's last login date if you go to their profile page and hover your cursor over the little person symbol next to their name.

For the searching, I would imagine it's being improved, but that's up to Sebi when the next version hits.