Looks like pretty easy groups for Manchester United and Arsenal. The rest seem pretty tough.
Group A: Deportivo La Coruña, Liverpool, Mónaco, Olympiakos.
Group B: Real Madrid, Roma, Bayern Leverkusen, Dinamo de Kiev.
Group C: Bayern Munich, Juventus, Ajax, Maccabi Tel-Aviv.
Group D: Manchester United, Olympique de Lyon, Sparta de Praga, Fenerbahce.
Group E: Arsenal, Panatinaikos, PSV Eindhoven, Rosenborg.
Group F: FC Barcelona, AC Milan, Celtic Glasgow, Shahktar Donest.
Group G: Valencia, Inter de Milán, Anderlecht, Werder Bremen.
Group H: Porto, Chelsea, Paris Saint Germain, CSK Moscú.