We have never offered them and I really hope we never do. The few times I've been asked to look into adding an HSA product I've pointed out that there is a huge disconnect between what the few clients that ask about them really want and what we would actually provide.
We don't get any requests from individuals wanting a stand alone HSA account, which would actually be the most uncomplicated entry into the HSA world. What we do have is a very small number (maybe 3 requests in the past 5 years) of small to mid sized businesses that are looking for someone to handle all of their HSA needs...for free. They want someone to bring to them a packaged HDHP/HSA, handle enrollment of their employees, provide education sessions, set up salary/payroll deferrals, provide debit cards, handle paper claims, and most importantly not charge for any of this.
HSAs are taking off as part of an employee benefit package and I really feel it should be left to those who are in the business of providing and administering employee benefits to take over this line of business. Stand alone HSA accounts for individuals that are not packaged with a HDHP as part of an employee benefits package are going to disappear.