http://www.persistence.com is a software company that provides "data acceleration infrastructure". 

Its products include:

	* ''EdgeXtend'' : plug-in ORM-tier (?) for J2EE servers with transactions, caching, failover
	* ''PowerTier'' : the same for .Net/C++ apps, can synchronize data/events with EdgeXtend
	* ''DirectAlert'' : rule-based client notification
	* ''Dynamai'' : caching for web content

[There used to be a from-marketing-for-management type of advertisement here, with IMHO very low signal/noise. For those who want it, I've still got a copy. The above is just an attempt to summarize the interesting bits. I'm also not sure the information is correct - for example, I always that that PowerTier was the EJB thingie. Somebody please correct/confirm this, if possible. Afterwards, please delete this comment here. --FalkBruegmann, 2002-08-29]