ARC Solutions is one of the many AMS vendors that I track (full disclosure: one of my clients uses them for their AMS). So I was intrigued and pleasantly surprised to hear that ARC has secured $2 million in venture capital funding to support the roll-out of their new product Polaris. I've seen an early demo of the product and it looks promising. ARC is selling it in a SaaS model (see salesforce.com as an example) so the pricing could be very association-friendly.
I'll be keeping an eye on the product and the company and will report back when I've learned more.