Can I edit the footer ?

edit

Not yet, but this feature will be out soon - I hope by mid-september - shortly after I finish oauth type logins (twiter, facebook and linkedin).

If you really need to change the footer now - edit a template /askbot/skins/default/templates/footer.html, the catch is that if you decide to modify templates, then you'll have to maintain your changes in the future. Git allows to do that easily after passing an initial learning curve.