ARC Energy Trust confirms June 16, 2008 cash distribution amount and increase

May 15, 2008

CALGARY, May 15 /CNW/ - (AET.UN and ARX - TSX) ARC Energy Trust (the
"Trust") is pleased to announce that in light of the strong commodity price
environment, the Board of Directors have approved a monthly "top-up"
distribution of $0.04 per unit. This will bring ARC's total distribution to
$0.24 per unit per month beginning with the June 16, 2008 payment. The
"top-up" distribution will be reviewed on a quarterly basis but is expected to
stay in place as long as commodity prices maintain their current strength. The
$0.24 per unit distribution will be paid to unitholders of record on May 31,
2008; the ex-distribution date is May 28, 2008.
As at May 15, 2008 the Trust's trailing twelve-month cash distributions,
including the May 15, 2008 payment, total $2.40 per trust unit.
ARC Energy Trust is one of Canada's largest conventional oil and gas
royalty trusts with an enterprise value of approximately $6.5 billion. The
Trust expects full year 2008 oil and gas production to average approximately
63,000 barrels of oil equivalent per day from six core areas in western
Canada. ARC Energy Trust units trade on the TSX under the symbol AET.UN and
ARC Resources exchangeable shares trade under the symbol ARX.

Note: Barrels of oil equivalent (boe) may be misleading, particularly if
used in isolation. In accordance with NI 51-101, a boe conversion ratio for
natural gas of 6 mcf:1 bbl has been used, which is based on an energy
equivalency conversion method primarily applicable at the burner tip and does
not represent a value equivalency at the wellhead.

ADVISORY - In the interests of providing ARC unitholders and potential
investors with information regarding ARC, including management's assessment of
ARC's future plans and operations, certain information contained in this
document are forward-looking statements within the meaning of the "safe
harbour" provisions of the United States Private Securities Litigation Reform
Act of 1995 and the Ontario Securities Commission. Forward-looking statements
in this document include, but are not limited to, ARC's internal projections,
expectations or beliefs concerning future operating results, and various
components thereof; the production and growth potential of its various assets,
estimated total production and production growth for 2008 and beyond; the
sources, deployment and allocation of expected capital in 2008; and the
success of future development drilling prospects. Readers are cautioned not to
place undue reliance on forward-looking statements, as there can be no
assurance that the plans, intentions or expectations upon which they are based
will occur. By their nature, forward-looking statements involve numerous
assumptions, known and unknown risks and uncertainties, both general and
specific, that contribute to the possibility that the predictions, forecasts,
projections and other forward-looking statements will not occur, which may
cause ARC's actual performance and financial results in future periods to
differ materially from any estimates or projections of future performance or
results expressed or implied by such forward-looking statements.

ARC RESOURCES LTD.
John P. Dielwart,
President and Chief Executive Officer

For further information: about ARC Energy Trust, please visit our website www.arcenergytrust.com or contact: Investor Relations, E-mail: ir@arcresources.com, Telephone: (403) 503-8600, Fax: (403) 509-6417, Toll Free 1-888-272-4900, ARC Resources Ltd., Suite 2100, 440 - 2nd Avenue S.W., Calgary, AB T2P 5E9