I should also add that a while ago Charles provided me with a listing from chipguide which when I have time might enable me to fill some information gaps in both directions in a format that he might be able to handle as a batch. It's not something I've had time to look at yet.
Something indicating either the source of info (particularly for updates) would be very useful though - specifically the date of that source. Otherwise I can see a situation where a listing with non TGT info is updated (corrected) because of TGT having more up to date info but then subsequently updated back to what it was before.
Although not shown in the printed version of TGT, this is something that has always been maintained in my TGT database.
Note again, I'm not talking about the date a chipguide entry is updated, but the date/source of the info used to update it.