Flash websites make the  busy professional's mobile experience with your company unmanageable.  Who cares?  You do if your brand appeals to busy professionals like me who can't survive without our mobile phones...

Flash is pretty but it's not useful if it kills your customer experience.

I visited no less than ten websites today via my iPhone; in lines a the store, between meetings, while waiting to pick up the kids.  I couldn't get the information I needed from three of them because their designers were heavy-handed with flash and flash can't be viewed on mobile devices.

The sites appeared as logoed wastelands sporting a "download flash now" message in place of content.  Somehow I doubt that these companies intended their expensively designed websites to end up as an advertisement for Adobe.

It happens that all three sites (www.collegepro.com, www.haircutsarefun.com, and www.goldclasscinemas.com) are all companies who appeal to busy professionals who have enough cash (especially in this economy) to use their services.  These companies all have gorgeous, appropriately designed websites when viewed on a computer screen.  The trouble is that I'm so busy that I'm likely to forget about why I thought to go to these sites in the first place and now so frustrated that I have a bad taste for those brands.

My plea:

If you represent a company that appeals to busy professionals (including B2B brands) please be sparing with the flash and/or spend a little more to optimize the mobile experience.

Flash is wonderful for telling a story.  Flash is great for adding a little spice to a section of the home page.  Flash is not good for navigation, content, or broad sweeping sections of your site.  Just say "no".