Thank you for your elaborate answers!

At the moment my requirements are not too complicated. (They might get more complicated later on.)

Given the fact that my solution probably will be used by others later on and the slower performance of the Razor Host module, developing a module seems to be the way to go.

Basically I would need the Html (or similar) module with the added functionality of being able to insert links to records in my SQL Server database. (Kind of how fields in Microsoft Word work.) I could develop my own Html module with the database linking functionality, but isn't it possible to extend or overlay the current Html module with the database linking I need (as loosely coupled as possible)?

Or may be extend the set of 'tokens' already included in DotNetNuke?
(Like you have under Admin...Languages...Language Editor. And then for example "Resource Name: EMAIL_BANNER_NOTIFICATION_BODY.Text" which contains [Custom:0], [Custom:1], etc. The tokens are probably coming from a resource file and not from SQL server.)

Both options seem to save a lot of work, but I'm not sure if they can be done and what I'll run into.

Your thoughts are much appreciated!

Thank you very much!

Thanks for your reply. Aren't you opening up your (Sandbox) DotNetNuke database?
If I type "Select * from Users" I'm probably getting a lot of "dummy" users and e-mail addresses but may be 1 or 2 are real names and addresses.