I'm also in Texas, and I work for a mid-sized tech company. We have no on-site daycare options, but we have a discount set up with a daycare in town -- maybe 10 or 15%?
I actually have been doing a lot of research about this lately because we're in the planning stages right now and I wanted to know how likely it would be to get my company to implement something like on-site daycare in a year or two before we're TTC. In my research, I found out that Working Mother magazine puts out a list of the top 100 companies for working mothers: http://www.workingmother.com/bestlist.html
It's very heartening to read about all the different types of companies that offer on-site daycare. I especially enjoyed reading about the duck pond at AFLAC.
If you want to make something like that happen at your workplace, it might help to get together with a group of women and start some sort of women's group first. A lot of those 100 best companies have a women's leadership network of some sort, and that can be a great force to be reckoned with! Here's an organization that could be a good resource if you want to start a group like that: http://www.catalystwomen.org/
I'm in the process of trying to get a group like this started at my company, so if any of you out there have done something like that or been involved with a similar group, I'd love to hear from you!
All in all, no, it's not common in the US for companies to have on-site daycare. But then the US workplace environment is centered around the traditional male lifecycle of working your brains out in your youth, and in general there's not a whole lot of flexibility for working mamas or
papas. I'm sure most of us know women who have left the workplace because there wasn't enough flexibility. We need to make the case to our workplaces that they're losing trained, talented workers by not providing more flex options for working parents.
I think it's going to take a combination of us changing mindsets at individual workplaces and women getting our act together politically to bring about real change in that department.