Wildshaping Druids do not, typically, gain the senses of the forms they assume.
Welcome to the abject insanity that is polymorphing in 3.5. For your specific question, the Alternate Form ability that Wild Shape is based on says:
The creature retains the special qualities of its original form. It does not gain any special qualities of its new form.
Since, in almost all cases, special senses like scent and blindsense are special qualities, this means that you don't get senses from Wild Shape.
Polymorph, and its related effects, are generally considered poorly written and poorly balanced in D&D 3.5, and are some of the most common effects that are houseruled or banned. Most of the alternate polymorph rules that I know change Wild Shape such that Druids can get their new form's senses, but by RAW, they do not.
That said, I'm absolutely certain that there's a way to get any sense you could name onto a wild shaping Druid. 3.5 is a huge set of rules, and that sounds like the sort of thing that would make it into a supplement at some point. One way is with the Enhance Wild Shape spell, on page 82 of the Spell Compendium. It lets you add one of several bonuses to your next wild shape, one of which is all of the extraordinary abilities of that form.