When your main advertising point is that the Aero is “one of the lightest Android smartphones,” you might have a problem but here it is: the Dell Aero on AT&T, finally shipping for $299.99 ($100 with contract). If you’ll recall, the Aero is a smaller Dell Streak with a fairly unique UI focused on social media and usability. We’ve been excited about this for quite a while so let’s keep an open mind but it’s been so long and the Streak is, quite honestly, quite good, so does the world need a Dell phone?