[cte]

We're still unsure of the cost to run this service as we scale up. We are looking for beta testers to try out our advanced features, so please email us, and we can get you a pro account for free, and start to iterate on the product to meet your specific needs (and lighter weight JS is definitely something we can fix for you).

[catch23]

we wrote something exactly like yours for corporate customers and although I love jQuery, we decided it was best to write it with just straight-up javascript. It was less code than I thought it would be considering how quick & dirty jQuery lets us do things.

Also, if you need to do something like the jQuery css selector style stuff, you might want to look at sizzle by jeresig. It clocks in at 4kb which isn't too big of an overhead.