Apple, Adobe and FileMaker aren't exhibiting at the MacLive Expo show which opened its doors at 10am today - though all three companies are represented by partners at the event.

Despite the big hitter's lack of attendance, show-goers may still find something useful to them at the show, opening hours for which will be extended on Friday 26 October to 6.30pm so they can get hold of a copy of Mac OS X 10.5 'Leopard'.

Microsoft will be demonstrating the new features in the forthcoming Microsoft Office 2008 for Mac,

Quark is providing a hands-on training classroom on the show floor offering attendees 45 minutes of free hands-on training on QuarkXPress 7 and Quark Interactive Designer. Quark is also hosting Apple hands-on training sessions on Mac OS X tips and tricks, Aperture 1.5 and FileMaker.

OKI Printing Solutions (OKI) is working with leading Apple Premium Reseller, Cancom, offering a series of live and interactive demonstrations of an integrated digital printing workflow at stand 535.

RapidSolutionsExperts is offering in-depth demonstrations of products from Adobe, Hasselblad, and Epson.

Nikon is publicly showing the new D300 professional digital SRL for the first time, with seminars and live demonstrations of the camera.

Roxio is offering daily Toast 8 demos at 10.30 and 3.00. Toast 8 now includes EyeTV support, cross-platform spanning, Blu-ray Disc burning, pro-quality audio mastering and more.

Computer Warehouse is celebrating its 20th Anniversary with many special show offers. It's also hosting an Apple product showcase, demonstrating Apple solutions across the range.

The TV boffins of Elgato will be showing EyeTV 2.5. When used with Elgato-supported hardware, the software enables video streaming of your TV recordings from your Mac to your iPhone or iPod touch using your WiFi network - and export to iTunes devices.

Accessories specialist Kensington is showcasing several new products at MacLive Expo. The LiquidFM range includes five FM transmitters, while the design-led Ci Lifestyle SlimBlade collection includes a mobile trackball, wireless mice, and media controller.

Shure is launching its £41 Mobile Phone Adapter (MPA) at the show. This converts Shure earphones into stereo headsets and allows iPhone users to switch between listening and communicating. Shure is also giving away two pairs of £99 SE210 earphones daily.

Macworld is putting the spotlight on the iMac and showcasing the evolution of the all-in-one Mac at MacExpoLive. From the original Bondi Blue iMac to the new slimline aluminium iMac, we look at how its changed over the years.