We are looking for a place where icon collections are available for purchase to be used in web applications.
Ideally we would love to use icons/images created from snapshots of common icons in Microsoft products, but this is not allowed. So we are looking for somewhere that we can purchase high quality icons that will be familiar to users.
In general a collection or group of icons we purchase must meet the following requirements:
1) The icons must be allowed to be used in web applications
2) We must be able to distribute our products without having to pay an extra for those icons - i.e. the licensing needs to be similar to the licensing from Microsoft Office Online images - where it can be freely distributed in applications as long as the prupose of the application is not to sell/distribute the icons
3) The icons must be clearly identifiable at small sizes. The ideal sizes would be around 16 x 16 pixels (like icons within Outlook "New" menu) or up to 22 x 22 pixels (i.e. fit in the Windows Quick Launch area)
4) Not too expensive ;o)
Any advice or specific links would be appreciated (but no google search links - been there done that)