The maker of the Blackberry phones, Research in Motion has recently won a domain name dispute against an Indian company over the registration of three domain names that they felt resembled and thus infringed on their Blackberry trademark.
The domain name dispute was about the registration of the domains of blackberry.com as well as blckberry.com and bllackberry.com. Even though not exactly the same the Indian firm only changed one letter in the domains and thus would bring confusion to users.
Many unscrupulous companies follow the technique to let users believe they are at the trademarked site when in fact they are at a fake site purchasing fake products or just simply throwing their money away.
In the event where you believe your trademark rights are infringed you should get in contact with Trademark Attorneys to help you take the correct steps.