It is really important to remember ones own username and password. Let's say for the sake of argument, somebody forgot their login credentials for their blogs webpage domain. In such a case it would be nearly impossible to recover said domain. Certainly one could argue that he/she could phone the host of the domain in question, and plead their case. This allegedly, due to absurd security constrains, would not get you very far. In any case, it would likely be much simpler to just purchase an new domain and forward ones blog to the new address.
I would just like to add, for no particular reason, the blog formerly found at www.travellingandtechnology.com can now be found at: www.wordymonkey.com