Oracle 11g with ASM - disk layout strategy

Hello folks,

we are looking at starting virtualizing our Oracle 11g systems. Some systems are RAC and some are standalone.  Currently we use ASM with ASMLib to manage disk.  I am trying to get some feedback on what other folks are doing in terms of their disk strategy. Here are my questions :

1) do you dedicate datastores for data files and separate datastore for log files ?

2) do you use paravirtualized disk ?

3) do you simply present a big vmdk file and then fdisk it and "oracleasm createdisk"  or do you use LVM and then "oracleasm createdisk"

4) what other questions should i be asking ?

I've found some random papers online but nothing specific.

Thank you