upgrade from SL to Lion tomorrow

[TheRekz]

As everyone knows Lion will be released tomorrow. What are the instructions on upgrading from SL to Lion? I don't have to backup my data and do a fresh OS install right? An upgrade is possible from SL?

 

[simsaladimbamba]

An upgrade is possible (and the most likely way to do it, as the GM did it the same way) and your data will not be deleted.
Anyway, if the installation frells up, you should have a backup anyway.