It looks like your templates now have an unterminated string or some other problem which the compiler can't handle.
We can quickly identify the problem if you can zip-up your .STML files and email them to email@example.com. You can also try to remember the last area of your templates you were working-on when this started to happen. Some simple things to try-- do a search in your .STML files for all <TE combinations (start of a TE tag)-- make sure that all are properly terminated with a > and that any text literals are terminated with the right double or single quote.
Sorry, once again if you send us your template files we can not only figure-out what is happening, but also fix whatever problem there is in the compiler that has caused this delay for you.