If you are just going for typo traffic or keyword traffic, all the names are gone. If you want to build a memorable site for visitors, there are tons of options. You have to understand how people remember and relate to things. People can put words into chunks. So a compound word is good.

Something like cardhawk.com is not bad because you only have to remember card, hawk and .com. As opposed to if you had poker911room.com you have too much to remember. The problem with cardhawk.com, though, is people will have to remember if it is cardhawk or cardhawks for example. There are a lot of little tricks you can use to find a good memroable domain name for a site.