You can get the IMEI using sysinfo.imei(). The documentation doesn't say anything about SIM card ID and the only thing I can think of is IMSI, which you can get using the elocation extension.
About elocation extension, yes it is available but it was not very stable under PyS60 1.4.
the86hitman compiled a version for PyS60 1.9.x, I just put this package online, you can test if it works.
I'll update the docs as soon as possible.