As usual I take no responsibility for anything that may or may not happen. This is a step by step walk through on how to install Wireshark in Hardy Heron Beta.

Step 1: Open Synaptic Package Manager
Step 2: Type in this wireshark in the search box
Step 3: Go down to wireshark-common and wireshark.
Step 4: Select both to install.
Step 5: Click apply.
Step 6: The packages will download and install.

Now to run Wireshark in Ubuntu 8.04 Beta:
Step 1: Press alt+F2
Step 2: type in this command: sudo wireshark

That is all you have to do to get wireshark installed and running.