The original registers are in Manx Museum - I understand that all have now been microfilmed and these digitised films are the basis of the family history centre to be opened next year - they were it seemed filmed by the Mormons thus it might well be that copies can be borrowed as per 1911 films but that I suspect will be some time in the future (and has to be reconciled with statement in Tynwald that the digital records in the Fam Hist centre would not be on the internet.
Volunteers have been indexing the entries in the original records.
The 1911 copy is generally excellent (I've come across very few errors in those parishes where I've compared entries - 99% of errors are in the mormon reading of the 1911 copy (ignoring the often totally spurious patron submitted which can range from guessed spouses to even confusion between two adjacent entries).
My comments on the Lonan Register are:
The Register has been conserved by the Museum and judging from most of the pages was in a very poor state prior to this. For many years a contemporary copy of the baptisms was given as part of the Bishop's Transcripts - some entries from this source have been used though more reconciliation may be useful. The register would appear to be a copy of an older register though there is a new title heading in 1778 - in places I had the feeling it may even have been reconstructed from the Bishop's Transcripts.
I had checked the IGI against the 1911 official copy (which is excellent in most places - for a few entries it is possible that the register was more readable in 1911 than today - in many places however the register was probably unreadable; for some years the Bishop's Transcripts can provide a near contemporary copy though in a couple of years the BT entries omit some names and in one year add two names not seen in the Register.