Resources about computer viruses

There are to excellent resources about computer viruses:

• VX Heavens, dedicated to providing information about computer viruses, featuring: a very big collection of viruses, the source code of many of them, links to antivirus engines, tools for constructing them, etc.
• VirusTotal, a service by the Spanish security firm Hispasec, that allows to upload files and to check them for viruses using around twenty antivirus engines.

Both extremely useful for antivirus researchers, or just for people interested on this topic.