Hot assets can take many forms; "A/R" of cash basis taxpayer, inventory and depreciation recapture. So make sure you understand if any of those items apply.
My comments are as follows:
1) If no hot assets, then no form 8308 would be required to be filed by the partnership
2) If the remaining two member's acquired the interest of the one member directly, no additional reporting required.
3) If the member was redeemed by the LLC, then report the liquidating distribution on the exiting member K-1.
4) Regardless of how the member exited, you could have the potential for a step-up in basis under Section 754. This election needs to be made on a timely filed form 1065. In addition, depending on how the exiting member interest was acquired, additional information under Section 734 or 743 needs to be included with the appropriate tax return. A section 754 would be beneficial if the exiting member was paid more than book value for their interest.
5) The exiting member will then need to determine their gain or loss upon disposition by comparing the liquidating distribution or cash from the other member's to their basis in the LLC. Hopefully the exiting member was maintaining a basis schedule.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.