MyTouch 3g Slide is probably the best for Android with keyboard for right now

While I like the keyboard the specs and price could be a little bit better. I like the design and pocketability.
Specs

• Operating System: Android 2.1 with modifed HTC Sense Android 2.2 coming soon
• Processor: 600 MHz Qualcomm MSM7227 ARM11 processor
• Ram: 512mb
• Storage: 512mb of Rom plus 8gb microsd card in the box and expandable up to 32gb
• Screen: 3.4 inch 320 x 480 Capacitive Touchscreen
• Sensors: proximity, ambient light sensors, and 3-axis accelerometer
• Text Input: Four row qwerty keyboard, virtual keyboard, swype, and genius button
• Rear Camera: 5mp camera with single led flash and no lens cover
• Front Facing Camera: No
• Battery: 1300mah
• Connectivity: Wi-Fi (802.11b/g), Bluetooth 2.1+EDR, ExtUSB, A-GPS Quad band GSM 850 900 1800 1900 MHz GPRS/EDGE
  Tri band UMTS 900 1700 2100 MHz HSDPA/HSUPA (US/Europe) (7.2/2 Mbit/s)