Hey John, that's quite a list of questions you got there Let me see if I can tackle them one by one -
What database is Honeycode using? (SQL Server, proprietary, etc)
At this time, I am not able to share this information with you. Honeycode is underpinned by a wide variety of AWS services as well as custom software in order to reach scale we wanted.
Where are Honeycode's data centers located?
Please refer to the following URL
https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/
Is it possible to embed apps created in Honeycode to other websites?
Not currently. But this is a great idea and I am going to make sure the rest of our team knows that users like you are asking for this!
Does Honeycode support standard scripts like SQL, CSS, HTML, JavaScript, and even Excel expressions?
Short answer is no, but you'll likely find the syntax to be very familiar. Take a look at these couple of articles - Honeycode Functions and Filters in Honeycode
What localization features are available? (other languages, dates, etc)
Honeycode currently supports only American English with US style formatting. I recognize that this is a gap and we will iterate to improve the product. Feedback from users like you is what drives our roadmap.
Is there an SLA uptime guarantee?
There is no specific SLA currently as Honeycode launched in Beta. However, availability is governed by the AWS Customer Agreement that you sign when creating your account.
Can Honeycode enforce referential integrity between tables?
Generally yes, but could you tell me more about your use case? Sounds interesting!
Is there a way to generate calendars, charts, and graphs?
Currently not, but we know that it is something users like you want, so we are hard at work on adding additional features to Honeycode!
Hope this helps John. Thank you for using Honeycode!