Shouldn't it be "backvp"?
Incidentally, I do own backvp.com.
- says the guy who also thought of a cute but easily-misspelled name for his app. Customers sometimes mis-spell it a few different ways in the same email.
Btw, fantastic design everywhere.
In Svpply and Svbtle it simply stands for "u", which is a deferral to how Romans would've written it.