Buy.com has Kingston 8GB CompactFlash Card - CF/8GB - Huge Savings! for $18.95 + free shipping.
Features
Capacities — 8GB
Standardized — complies with CompactFlash Association specification standards
Small — one-third the size of a full-size PC card
Easy — plug-and-play
Guaranteed — lifetime warranty
Versatile — compatible with PC Card Type II adapters
Economical — autosleep mode preserves system battery life
Tech Specs
Dimensions — 1.43" x 1.68" x 0.13" (36.4mm x 42.8mm x 3.3mm) - CF Type
Operating Temperature — 0o to 60o C / 32o to 140o F
Storage Temperature — -20o to 85o C / -4o to 185o F
Voltage — 3.3v / 5v
Kingston 8GB CompactFlash Card - CF/8GB $18.95 FS 
