Firefox mycroft plugins (and IE7 search providers)

I started creating mycroft plugins ages ago, but got frustrated because I couldn't figure out the keyboard short to change the plugin being used. Well, it turns out to be Alt + Up/Down so they're back in favour with me. Most of the ones I created have now been done by other people and are available from the mycroft mozdev pages.

UPDATE: I've now created IE Search providers for each of these so that you can get the same functionality in Internet Explorer 7

Microsoft Knowledge Base Search 
Locate a Microsoft Knowledge Base article by number. Click on the link to install. (NB Do not enter a KBID prefix. ie. enter 123456 not Q123546)
IE7 Users: Install the Search provider

Cottages4You Property Reference Search 
Finds a Cottages4You property from its reference
IE7 Users: Install the Search provider

Streetmap postcode conversion 
Looks up a postcode on StreetMap and returns its coordinates
IE7 Users: Install the Search provider

DevSearch 
A plugin to make Dev Searches quicker
IE7 Users: Install the Search provider

WHOIS Search 
A plugin that performs WHOIS lookups using Network Solutions IE7 Users: Install the Search provider

Waitrose Recipe Search 
A plugin that searches Waitrose recipes IE7 Users: Install the Search provider