Thanks for all the emails and messages – WE WERE NOT HACKED 
Last night our server started experiencing a problem with apache and the number of connections grew and grew until the server could no longer cope. Our technicians at ThePlanet.com restarted the services while we were sleeping and now all is well.
However, we have some lessons to learn from this.
Some customers, when accessing our extensions admin consoles on their sites, experienced this error:
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Fatal error: XML Error : Undeclared entity warning at line 37 in administrator/components/com_kb/bfXML.php on line 141
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The reason for this: Our components, when invoked through your admin console retrieve the XML file at http://www.phil-taylor.com/versions.php in order to evaluate if an update or serious security issue alert is available for this extension. At the moment if our site is offline you will experience the above error.
Clearly this is unacceptable and so we will be taking steps in the next releases to capture this error and to bypass the version check if the XML file is unavailable. You can currently do this by editing /plugins/system/blueflame/bfTweaks.php and toggling the true/false on the _SKIP_UPDATE_CHECK define line.