They only released it last week, but Nucleus Soundlab has updated their Spring Synthesis ReFill Bundle with another Reason ReFill. Viral Outbreak ($69 value) is now available for all purchasers who pay $49.99 or more.
A spokesperson had this to say about it, "Viral Outbreak brings the Virus TI synthesizer to Reason. 2.5Gb of samples and 180+ soundsets of cutting-edge electronica sounds are included. Not only that, a brand-new expansion bank of 32 patches is exclusively available with the bundle. These new patches by Tom Pritchard are highlighted by a focus on new Reason effects, including Alligator, Pulveriser, and The Echo."
Pricing and Availability:
The Spring Synthesis now encompasses 9 ReFills with a regular price of over $350 - at a Pay-What-You-Want price. The sale ends May 28th, 2012.