Does anyone have any input on the indexing rules when using a GUID primary key column?

My understanding is that using a clustered index on this is not a good idea, for the same reasons as not using a clustered index on a name field. So a non clustered index is the other alternative. So then if there are no other great candidates for a clustered index, why would you create a column with sequencial number just so you can have a clustered index as suggested by others. I can't see the benefit in this.

One final point. The article is a general guide which seems quite valid. One major point that I believe has been mmissed by all is to considere the ratio of updates/inserts/deletes to selects. This should have a major impact on your decision making process. An extra couple of milliseconds on an insert due to an index recalculation is insignificant compared to a second on a select.