EA has made its titles available to the Steam UK store and has changed the prices in Europe for some of its games, so now they aren't as overpriced as they were before.
BattleForge
US: $19.99
UK: £19.99 (59% higher)
EU: 29,99€ (121% higher)

Burnout Paradise: The Ultimate Box
US: $29.99
UK: £19.99 (7% higher)
EU: 29,99€ (46% higher)

Command and Conquer: Red Alert 3
US: $29.99
UK: £19.99 (7% higher)
EU: 24,99€ (21% higher)

Crysis
US: $29.99
UK: £19.99 (7% higher)
EU tier 1: 29,99€ (46% higher)
EU tier 2: 29,99€ (46% higher)
EU tier 3: 29,99€ (46% higher)
Denmark, Netherlands, Norway and Sweden pay 19,99€.

Crysis Warhead
US: $29.99
UK: £19.99 (7% higher)
EU: 29,99€ (46% higher)

Crysis Complete Pack
US: $39.99
UK: £34.99 (39% higher)
EU tier 1: 49,98€ (84% higher)
EU tier 2: 59,98€ (121% higher)
EU tier 3: 59,98€ (121% higher)

Dead Space
US: $29.99
UK: £14.99 (20% lower)
EU: 19,99€ (3% lower)

FIFA Manager 09
US: $29.99
UK: £19.99 (7% higher)
EU: 24,99€ (21% higher)

Mass Effect
US: $19.99
UK: £12.99 (4% higher)
EU: 14,99€ (9% higher)

Mirror's Edge
US: $19.99
UK: £12.99 (4% higher)
EU: 14,99€ (9% higher)

Need for Speed Undercover
US: $9.99
UK: £14.99 (138% higher)
EU: 19,99€ (194% higher)

SPORE
US: $39.99
UK: £29.99 (20% higher)
EU: 39,99€ (46% higher)

SPORE SPORE Creepy and Cute Parts Pack
US: $59.98
UK: N/A
EU: 49,98€ (21% higher)

SPORE + SPORE Galactic Adventures
US: N/A
UK: £44.98
EU: 59,98€

SPORE Creepy and Cute Parts Pack
US: $19.99
UK: £9.99 (20% lower)
EU: 9,99€ (27% lower)

SPORE Galactic Adventures
US: $29.99
UK: £14.99 (20% lower)
EU: 19,99€ (3% lower)