Looks like OS 220.127.116.11 has started to make its rounds for the 9500 GSM Vodafone Storm. From what I am hearing so far this new version fixes quite a bit of the lag problems and slightly improves battery life.
As an FYI THIS WILL NOT WORK ON A CDMA 9530 STORM
You can pick it up at Vodafone’s website at this link
Thanks Brad & DavidB for sending this one in also via Jason over @ BlackBerryNews