Rooted your Aria, in hopes of wireless tethering? Then you realized for whatever reason the Aria was incapable of this basic root functionality? Fret no longer. Now, WiFi Tether is available for the Aria, thanks to attn1 (over at XDA) and Harald Mueller. Although it is confirmed working, it does take a little work on your part. You will need to follow this short step-by-step guide, in order to get the WiFi Tether app working.
Link to WiFi tether app here: wireless_tether_2_0_5-pre3.apk - android-wifi-tether - Wireless Tether for Root Users 2.0.5-pre3 *** EXPERIMENTAL *** - Project Hosting on Google Code
Link to "patch" here: Setup_HTC_Desire_Incredible - android-wifi-tether - Setup Howto for HTC Desire, HTC Incredible - Project Hosting on Google Code
Let us know if this worked for you.