There isn't any thread here I could find about it, (Sorry if I missed one...), and not much other than the actual website turned up on a Google search.
Certainly the Squeeze Mobi WSO's seem well received, and rather than piece together the many services associated with mobile, I like the idea of an integrated platform.
Anyone else want to suggest a different single source mobile services provider working well? Dave Iago's system v6 SMS platform looks good, but is very much a work in progress..
What are you using now, and why do you stay with them?