With Apple chief Steve Jobs skipping out on this year’s Macworld Expo a few weeks ago, investment bank Piper Jaffray isn’t holding high hopes for new product announcements outside a pair of refreshed Mac designs, but said in a report Tuesday that a redesigned iPhone should surface in the months that follow.

Their quote: “Predicting product announcements for this year’s Macworld has been difficult with new iPods and Macs released in the fall and the relatively new iPhone 3G,” analyst Gene Munster told his clients. “With Apple marketing person Phil Schiller delivering the keynote, we believe it suggests there will not be any revolutionary products at this year’s event.” A bunch of ‘how great we are!’ marketspeak seems to be the order of the day, in other words.

Still, the analyst believes a couple of existing products could see a refresh at the annual conference, namely the iMac and Mac mini. Meanwhile, his hopes for a new iPhone — at one time seen as having an outside chance of appearing at the show — have been dashed with word that Jobs would not be delivering his traditional keynote presentation. Rumors continue to swirl about a new iPhone form factor, namely a smaller “Nano” version in the works. We probably won’t hear about it there however.