Sorry if this is a dumb question, but can I use the logos of other services and companies on my site? Ie, if I wanted to put up a graphic of some services that relate to local internet marketing, could I put together a graphic with like Yelp/Foursquare/Groupon/Gowalla in it?
With all the Twitter/Facebook/Linkedin logos being used across the internet (without asking them explicitly for permission), maybe some are OK but others not?
Any thoughts? Thanks!