Suspension fork bleeders are designed for a quick release of built up air pressure. The push button operation allows the pressure to be released without any tools, leaving the forks to act as normal, and to an extent, reducing arm pump - as you are likely to bleed them more often.
They are easy to install, as they just replace the OEM bleeder screw on the fork cap.
Obviously make sure the forks are fully extended (jack the bike up on a stand) before releasing the pressure.
There are quite a few about, but i've used the Motion pro bleeders in the past which are RRP £12.99 from http://www.ultimatepursuits.co.uk/
