Assets App files size limit?

Hi Drew,

Is there a limit on size when uploading a file as an asset? I've been trying to upload some hi-res images (wrapped up in zip files) most are between 20 - 30mb. I can upload them one at a time OK but when I try to upload them in a batch (e.g. 2 or more at a time) they go through the process of uploading (with the progress indicator) but when finished don't show up in the bucket (or in the directory on the server). Also I've created a super zip containing a complete collection of hi-res images (10-15) which weighs in at 250mb (for those with fast connections) when I upload this again it goes through the process of uploading but once finished doesn't appear.